If AH = -54.74 kJ for a chemical reaction, that reactionis endothermiccannot occuris exothermic

In endothermic reaction heat is require while in exothermic reaction heat is given off.

Answered: If AH = -54.74 kJ for a chemical…

Science

Chemistry

If AH = -54.74 kJ for a chemical reaction, that reaction O is endothermic cannot occur is exothermic

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter5: Thermochemistry

Section: Chapter Questions

Problem 5.68QE

See similar textbooks

Related questions

Q: If 1101 J of heat is available, what is the mass in grams of iron (specific heat = 0.450 J/g•°C)…

A: HEAT ENERGY: When the atoms present in a compound which can be a solid, liquid or a gaseous molecule…

Q: How much heat (in joules) is used to heat an 80.88-gram sample of iron from 3.59 °C to 100 °C if the…

Q: Temperature of 150. g of iron increased from 27.1 °C to 33.1 °C after absorbing 406 J of heat, what…

A: Given data,Mass of iron=150gInitial temperature=27.1oCFinal temperature=33.1oCHeat (Q)=406J

Q: If 4.62 kJ of heat is available, what is the mass in grams of iron (specific heat = 0.450 J/g･°C)…

Q: A chemical reaction occurs and 64.7 cal is transferred to the system. How many joules is this? is…

A: We have to predict nature of reaction and heat in joules.

Q: Given 35.0 grams of aluminum at 22.0 °C. What will be the final temperature of the Al if 300.0…

A: Specific heat :- The amount of heat required to raise the temperature of 1 gram of a substance…

Q: The reaction 3H2(g) + N2(g) → 2NH3(g) has an enthalpy of reaction of -92.6 kJ/mol. If 2 g of…

A: According to the given balanced chemical equation, one mole of nitrogen reacts to produce 92.6 kJ of…

Q: The temperature of 756 g of water in a calorimeterincreases from 23.2°C to 37.6°C. How much heat…

A: Given: Mass = 756g Initial temperature= 23.2oC Final temperature= 37.6oC To find: The heat given off…

Q: How many grams of C,H, liquid must decompose according to the following chemical equation to…

A: Given :- C6H6(l) ---> 3C2H2(g) ΔH = 630 kJ To calculate :- Amount of C6H6 that will be…

Q: What is q if 28.6 g of water is heated from 22.0°C to 78.3°C? The specific heat of water is 4.184…

A: The change in temperature taking place is,

Q: A propane tank on a home barbeque contains 10.4 * 103g ofpropane.a. Write the balanced chemical…

A: Solution- (a)-C3H8(g)+H2O(g) → 3CO2(g) + 4H2O(g)∆Horxn=∑∆Hf(product) - ∑∆Hf(reactants)=(3× -393.5)…

Q: How much heat (in kJ) will be released (AH) if 1.20 mol of SrO is mixed with 0.945 mol of CO2 the…

A: Let's observe this reaction first 1 mole of SrO reacts with 1 mole CO2 to produce 1 mole of SrCO3…

Q: When 305.2 calories of heat are added to 32.02 g of copper (specific heat capacity of 0.0920 cal/g…

A: The heat 'q' which is required to raise the temperature of a sample of mass 'm' having specific heat…

Q: Which of the following statements DOES NOT correctly describe an EXOTHERMIC reaction? O q is…

A: Depending upon whether the system absorbs or gives energy during a reaction, the reaction is…

Q: In the following experiment, a coffee-cup calorimeter containing 100 mL of H2O is used. The initial…

A: Calculate the heat released when 9.10 g of CaCl2 is dissolved:

Q: A 15.0 gram lead ball at 25.0°C was heated with 40.5 joules of heat. Given the specific heat of lead…

A: The change in temperature of the lead ball can be calculated by equation (1). where q is the heat…

Q: If 427 J of enesgy is indirectly converted to chemical energy, which is then converted to mechanical…

A: According to the law of conservation of energy the, the energy can never be created nor be destroyed…

Q: A 300 g piece of copper is heated and fashioned into a bracelet. The amount of energy transferred by…

Q: how many grams of iron

Q: When 4 moles of NH3(g) react with O₂(g) to form NO(g) and H₂O(g) according to the following…

A: Given reaction: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g) The amount of energy evolved = 905 kJ We have to…

Q: The heat of formation of H2SO4 is -909.27 kj/mol. Give the thermochemical equation for the formation…

A: Here we are required to show the formation of aqueous sulphuric acid

Q: The temperature of a brass bar by 10.0°C when it absorbs 2.00kJ of energy by heat. The mass of the…

Q: if the standard heat for hydrogen (H2) is 0, what is the ammount of energy required or released in…

A: Heat of reaction is defined as the heat required or released during a chemical reaction. According…

Q: Based on the thermochemical equation shown below, which statement is corred? C6 H12O6(s) + 602 6…

Q: If 801 J of heat is available, what is the mass in grams of iron (specific heat = 0.450 J/g•°C) that…

A: Given, specific heat = 0.450 J/g.oC heat = 801 J , mass = ? , ∆T= 120°C - 22.5°C = 97.5°C

Q: What is the specific heat capacity (J/g• °C) of a metal object whose temperature increases from…

A: Specific heat capacity is the amount of heat absorbed by 1 gram of a substance to raise its…

Q: 7. When 0.63 g of solid LiCI (AHsoln = – 37.1 kJ/mol) dissolves in 5 L of water, how much heat is…

A: Answer :- Heat released (q) when 0.63 g LiCl dissolved in 5 L water = -552.8 (J) = -0.5528 (kJ)…

Q: If 801 J of heat is available, what is the mass in grams of iron (specific heat = 0.45 J/g･°C) that…

A: Q = heat =801 J ΔT = change in temperature = (120 - 22.5) = 97.5 oC c = Specific heat = 0.45 J/goC…

Q: 5) What is the specific heat in J/ge C of a 5.75 x 0 kg piece of metal if the addition of 41.83 cal…

A: Given:- ∆T = 71.6°F q = 41.83 cal m = 5.75 × 10-3 kg To calculate :- Specific heat capacity…

Q: OWhen a 0.740-g sample of trinitrotoluene (TNT), CH-N,Oo, is bumed in a bomb calorimeter, the…

A: Given volume of water = 675mL Density of water = 1g/mL So, mass of water = volume×density = 675g…

Q: Hydrogen sulfide, H2S, is produced during decomposition of organic matter. When 0.6850 mol H2S burns…

Q: If 1001 J of heat is available, how many grams of iron (specific heat = 0.45 J/g･°C) can be heated…

A: The equation is:

Q: If 601 J of heat is available, how many grams of iron (specific heat = 0.45 J/g･°C) can be heated…

A: The amount of available energy is = 601 J The specific heat of iron is = 0.45 J/g･°C Increase in the…

Q: A sample of aluminum metal absorbs 9.86 joules of heat, pot which the temperature of the sample…

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: A gas sample does 214 J of work upon expanding and the cools, losing 34 J of heat. What is the total…

A: The first law of thermodynamics is given asΔU=Q−W, Δ U = Q − W , whereΔU is the change in internal…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 140. kJ during a…

A: Enthalpy of a mixture of gaseous reactants increases by 140. KJ It means enthalpy change (∆H) = +…

Q: If 901 J of heat is available, what is the mass in grams of iron (specific heat = 0.450 J/g･°C) that…

A: The amount of heat available is = 901 J The specific heat of iron is = 0.450 J/g.oC The rise in…

Q: If 115 cal are added to 51.4 g of solid iron, what is the change in temperature of the iron? The…

A: Given: Heat added = 115 cal Mass of solid iron = 51.4 g Specific heat of iron is 0.11 cal/goC

Q: How much heat (in kJ) will be released (AH) if 0.4501 mol of NH3 are mixed with 0.200 mol of O, in…

A: Applying concept of limiting reagent and heat released.

Q: The specific heat of octane, C8H18(l), is 2.22 J/g-K. (a) Howmany J of heat are needed to raise the…

A: Molar mass of octane: 114 g/molSpecific heat: 2.22 J/g-K Molar mass of water: 18 g/molSpecific heat:…

Q: The complete combustion of propane, C3H8 (g), is represented by the following unbalanced equation…

Q: The specific heat of aluminum is .900J/g degree C, what is its molar specific heat?

A: The specific heat of aluminium=0.900 J/goC Mass of 1 mol of aluminium= 26.98 g Molar heat capacity…

Q: The value of ΔH0for the reaction is -482 kJ. What is the heat released to the surroundings when…

A: When two moles of CO reacts with one mole of O2, two moles of CO2 are formed. The amount of heat…

Q: If 801 J of heat is available, what is the mass in grams of iron (specific heat = 0.450 J/g °C) that…

A: For the first question simply it follows the q= ms∆t equation. For the second one it is the case…

Q: If 601 J of heat is available, what is the mass in grams of iron (specific heat = 0.450 J/g.°C) that…

Q: A 27.7 g sample of ethylene glycol, car radiator coolant,loses 688 J of heat. What is the initial…

Q: The ΔH°f for water gas is -242 kJ per mol, but the ΔH°f of O2 (g) is zero. Explain this difference…

A: Standard enthalpy of farmation is the change of enthalpy when one mole of a substance in its…

Q: As a gas expands, it absorbs 225 J of heat and does 243 J of work to the outside. Accordingly, the…

Q: Given: 2 Fe(s) + 3 0,(g) 2 Fe,0,(s) AH°= -789 kJ -> The reaction shown above is and therefore heat…

A: An exothermic reaction is a reaction for which the overall standard enthalpy change ∆H is negative.

Q: ining this experiment in the laboratory, you should be able to an estions. othermic and exothermic…

A: Given : Initial temperature = 500C Final temperature = 100C

Question

If AH = -54.74 kJ for a chemical reaction, that reaction
is endothermic
cannot occur
is exothermic

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

9.57 The heat of combustion of butane is —2877 kJ/mol. Use this value to find the heat of formation of butane. (You may also need to use additional thermochemical data found in Appendix E.)
Given 2Cr2O3(s)4Cr(s)+3O2(g)H=+2269.4kJ (a) What is the heat of formation of chromium(III) oxide? (b) What is H for the formation of 13.65 g of chromium (III) oxide?
Define the terms system and surroundings. What does it mean to say that a system and its surroundings are in thermal equilibrium?
9.53 Using these reactions, find the standard enthalpy change for the formation of 1 mol of PhO(s) from lead metal and oxygen gas. PbO(s)+C(graphite)Pb(s)+CO(g) H = 106.8 kJ 2C(graphite)+O2(g)2CO(g) H= -221.0 kJ If 250 g of lead reacts with oxygen to form lead(II) oxide, what quantity of thermal energy (in kJ) is ahsorhed or evolved?
A 5.00-g sample of aluminum pellets (specific heat capacity = 0.89 J/C g) and a 10.00-g sample of iron pellets (specific heat capacity = 0.45 J/C g) are heated to 100.0C. The mixture of hot iron and aluminum is then dropped into 97.3 g water at 22.0C. Calculate the final temperature of the metal and water mixture, assuming no heat loss to the surroundings.
Microwave ovens convert radiation to energy. A microwave oven uses radiation with a wavelength of 12.5 cm. Assuming that all the energy from the radiation is converted to heat without loss, how many moles of photons are required to raise the temperature of a cup of water (350.0 g, specific heat =4.18J/gC) from 23.0C to 99.0C?
9.50 When a 13.0-g sample of NaOH(s) dissolves in 400.0 mL of water in a coffee cup calorimeter, the temperature of the water changes from 22.6°C to 30.7C Assuming that the specific heat capacity of the solution is the same as for water, calculate (a) the heat transfer from system to surroundings and (b) H for the reaction NaOH(s)Na+(aq)+OH(aq)
When 50.0 g of 0.200 M NaCl(aq) at 24.1 C is added to 100.0 g of 0.100 M AgNO3(aq) at 24.1 C in a calorimeter, the temperature increases to 25.2 C as AgCl(s) forms. Assuming the specific heat of the solution and products is 4.20 J/g C, calculate the approximate amount of heat in joules produced.
A small car is traveling at twice the speed of a larger car, which has twice the mass of the smaller car. Which car has the greater kinetic energy? (Or do they both have the same kinetic energy?)
A sample of nickel is heated to 99.8C and placed in a coffee-cup calorimeter containing 150.0 g water at 23.5C. After the metal cools, the final temperature of metal and water mixture is 25.0C. If the specific heat capacity of nickel is 0.444 J/C g, what mass of nickel was originally heated? Assume no heat loss to the surroundings.
Peanuts and peanut oil are organic materials and bum in air. How many burning peanuts does it take to provide the energy to boil a cup of water (250 mL of water)? To solve this problem, we assume each peanut, with an average mass of 0.73 g, is 49% peanut oil and 21% starch; the remainder is noncombustible We further assume peanut oil is palmitic acid, C16H32O2, with an enthalpy of formation of 848.4 kJ/mol. Starch is a long chain of C6H10O5 units, each unit having an enthalpy of formation of 960 kJ.