Which of the following has a ΔH°f= 0 kJ/mol? Group of answer choices Cl-(aq) CO2(g) NH3(aq) O3(g) I2(s)

Q: Which of the following has a standard heat of formation of zero? Group of answer choices Liquid Pb…

A: Entalpy of formation :-             It is the enthalpy change of a system when one mole of compound…

Q: CH4(g) + 2O2(g) CO2(g) + 2 H2O(1) AH = -890.3 kJ. How much heat will be released if 4.0 g of methane…

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Q: If the specific heat of methanol is 2.51 J/K-g, how many joules are necessary to raise the…

A: Given, mass of methanol = 94 g C= 2.51 J/K g Tf = 79°C = 273+79 = 352 K Ti = 26°C = 273 + 26 = 299 K…

Q: 1.30 kg of an unknown substance was heated up using 7,198 cal energy from 46.8 degree celsius to…

A: Given: Mass of the substance, m=1.30 kg=1.30 x 1000=1300 g Heat provided,q =7,198 cal =7198 x 4.184…

Q: Carbon disulfide burns in air, producing carbon dioxide and sulfur dioxide. CS2 (1) + 302(g) →…

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Q: A 75.0 g piece of Ag metal is heated to 80.0 °C and dropped into 50.0 g of water at 23.2 °C. The…

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Q: 4 The specific heat of lead is 0.129 J / g 0C . How many joules of heat is required to raise the…

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Q: How much energy (in kJ) does it take to turn 75.00 g of octane (C8H18) at 85.65°C into a gas at…

A: Here, we have to find the amount of energy required in kJ to turn 75.00 g of octane (C8H18) at…

Q: When 2.35g Mg(OH)2 is added to 250.0 mL of water, the temperature of the water raises from 20.5°C to…

A: Solution A standard molar reaction H, ΔrH∘ , is that the same because the molar integral reaction H…

Q: 3. What can be concluded from this thermochemical equation? NaOH (s) → Na*(aq) + OH(aq) AH = – 45…

A: Given thermochemical reaction; NaOH(s)  ----->  Na+ (aq)  + Cl- (aq)  Enthalpy change of…

Q: 5.53        The specific heat of octane, C8H181l2, is 2.22 J>g@K. (a) How many J of heat are needed…

A: The question is based on the calculation of specific heat capacity.  using  specific heat capacity,…

Q: If the specific heat of methanol is 2.51 J/K-g, how many joules are necessary to raise the…

A: The formula of heat is given by: q = m×c×∆THere, m = massc = specific heat∆T = change in temperature

Q: 1. How much phosphorus in grams is required to release 222.94 kJ of heat? 5 Ni + 2 P -> Ni5P2  △ H…

A: Thermodynamics is the branch of chemistry which deals with the study of heat and other forms of…

Q: A coffee-cup calorimeter contains 30 mL of water with an initial temperature of 24.8°C. An unknown…

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Q: The specific heat of silver is 0.24 J g*C. How many jules of energy are needed to arm 4.37 g of…

A: Given, Specific heat = 0.24 J/g°C m = 4.37 g Final temperature, Tf = 27.5°C Initial temperature, Ti…

Q: Glucose, C6H12O6, is converted into ethyl alcohol, C2H5OH in the fermentation of fruit juice to…

A: The chemical equation for conversion of glucose to ethyl alcohol.C6H12O6 (s) → 2 C2H5OH (l) + 2 CO2…

Q: 8. Liquid hydrogen peroxide, an oxidizing agent in many rocketfuel mixtures, releases oxygen gas on…

A: Given chemica equation for the decomposition of hydrogen peroxide is  2H2O2(l) ------> 2H2O(l) +…

Q: he specific heat of a certain type of cooking oil is 0.418 cal/(g·°C). How much heat energy is…

A: Mass of oil = 0.992 kg Initial temperature = 23 ◦C Final temperature = 60 ◦C Specific heat = 0.418…

Q: a chemistry experiment, 4.24 g of lithium chloride is dissolved in 100 mL of water at an initial…

A: The molar heat of solution is also called as a molar enthalpy of solution. This molar enthalpy of…

Q: The enthalpy of combustion of a gallon (3.8 liters) of gasoline is about 31,000 kcal. The enthalpy…

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Q: Consider the following reaction: 2 Mg(s) + O2(g) ⟶⟶ 2 MgO(s)…

A: There is a  the  reaction  :- 2 Mg(s) + O2(g) ------------> 2 MgO(s).…

Q: When 1.50 mol of CH4(g) reacts with excess Cl2(g) at constant pressure according to the chemical…

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Q: 1. Sodium cyclamate, NAC6H12NSO3, was popular nonsugar sweetener until it was banned by the Food and…

A: Answer of 1

Q: What is the enthalpy change, Delta Hrxn, for the following reaction?      2 RbI (s)  +  Cl2 (g)…

A: Enthalpy is a state function, so we determine the change of enthalpy of a reaction by subtracting…

Q: What is the specific heat of a substance if removing 95.0 J of energy decreases the temperature of…

A: Specific heat: The amount of heat energy required to raise the temperature of 1 g of a substance by…

Q: CaCO3(s) + 2 HCl(aq) –––> CaCl2(aq) + H2O(l) + CO2(g); ∆H° = -15.2 kJ Given the thermochemical…

A: We have to calculate the amount of heat liberated.

Q: The heat of combustion of glucose (C 6 H 12 0 6) is 2.82 x 10 kJ/mol. If a 1.25 g sample of glucose…

A: Option 6.21 kJ/oC is answer

Q: The thermochemical equation for the combustion of benzene is shown below: 2 C6H6(liq)  +  15 O2(g)…

A: Applying enthalpy change of combustion of benzene.

Q: Given the following thermochemical equations, C2H2 (8) + O2 (g) → 2CO2 (8) + H2O (I) AH C (s) + O2…

A: The chemical equation for the decomposition of one mole of acetylene to its elements is given…

Q: Carbon monoxide reacts with oxygen to form carbon dioxide by the following reaction: 2 CO(g) + O2(g)…

A: Carbon monoxide reacts with oxygen to form carbon dioxide by the following reaction:2 CO(g) + O2(g)…

Q: What is the specific heat of lead in J/(g⋅∘C)J/(g⋅∘C) if it takes 97.3 JJ to raise the temperature…

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Q: What is the enthalpy change, Delta Hrxn, for the following reaction?      2 RbI (s)  +  Cl2 (g)…

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Q: what is the enthalpy change when 7.62 moles of nitrogen dioxide react?   2 NO2 (g)   →    N2O4 (g)…

A: We will use stoichiometry of the reaction to get the answer

Q: When 30.0 g of C8H14 is combusted in a bomb calorimeter, the bomb calorimeter increased in…

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Q: sample of water with a mass of 726.2 g undergoes a temperature change from 58.32oC to 40.50 oC. What…

A: Given,  mass, m = 726.2 g Specific heat of water (l), S = 4.184 J/g. oC Temperature changes from T1…

Q: How much heat is produced by combustion of 125 g of methanol under standard state conditions? CH3OH…

A: The standard conditions are partial pressure of all gas at 1 bar of pressure   (1 bar=0.987 atm, so…

Q: 10.) The heat of formation of H2SO4 (ag) is -909.27 kl/mol. Which of the following is the…

A: Given:  Heat of Formation for H2SO4 is -909.27kJ/mol

Q: 2. The specific heat of octane, C8H18(0), is 2.22 J/g-K. a. How many J of heat are needed to raise…

A: We know that, Q = mC∆T Q is the energy in joules. m is the mass of the substance. ∆T is the…

Q: exothermic

A: Molar mass(MM) of trinitroglycerin = 227 g/mol Mass of trinitroglycerin = 575 g Moles of…

Q: 9. Calculate AH for the reaction 4NH3 (g) + 502 (g) → 4NO (g) + 6H20 (g), from the following data.…

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Q: Which of the following is the correct molar specific heat of water used when making calculations…

A: Specific heat capacity is defined as the amount of heat required to increase the temperature of one…

Q: A copper cylinder has a mass of 76.8g and a specific heat of 0.092 cal/g°C. It is heated to 86.5°C…

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Q: How much heat is put into 100g of water to raise temperature from 25.0 to 75.0°C? The specific heat…

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Q: How much heat (in J) is required to raise the temperature of 12 g of tin from 19°C to 24°C? S.H.Sn…

A: HEAT Heat Q that must be supplied or removed to change the temperature of a substance is given by…

Q: What amount of heat is needed to raise the temperature of 25.5 g of water from 18oC to 29oC? Water's…

A: q = mc∆T  q is the amount of heat energy required  m is the mass of substance  c is the specific…

Q: An unknown substance with a mass of 100 grams absorbs 1000 J while undergoing a temperature increase…

A: Given, An unknown substance with a mass of 100 grams absorbs 1000 J while undergoing a temperature…

Q: A 146.3g piece of iron (specific heat = 0.449 J/g°C) is heated with a flame and dropped into a coffe…

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Q: What is the specific heat of silver if it requires 86.3 J of energy to raise the temperature of 15.0…

A: According to thermodynamics, heat changed during a reaction is given by the relationship:q = mcΔT…

Q: Ethyl alcohol, C2H5OH, has a specific heat of 2.40 ?? °?. Which of the following statements best…

A: Specific heat = 2.40 J /g °C  Which statement is best described :  a) It takes 1 joule of energy to…

Q: A piece of silver with a mass 368 g has a heat capacity of 87.2 J/°C. What is the specific heat of…

A: Given that heat capacity = 87.2 J/°C mass of silver = 368 g Specific heat capacity = heat…