8. For the reaction 2CH4 (g) + 3 C12 (g)→2 CHC13 (1) +3 H2 (g), AH° = -118.6 kJ. AH°f=-134.1 kJ/mol for CHC13 (I). Find AH°f for CH4 (g).

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…

A:

Q: Methanol, ethanol, and n-propanol are three common alcohols. When 1.00 g of each of these alcohols…

A: (a) The heat combustion value of methanol is determined as follows,

Q: Use Hess's law to calculate ΔG°rxn using the following information.               NO(g) + O(g) →…

A: The first thing to do is to change the bottom three reactions to make it look like the top reaction.…

Q: 3.5 g of a hydrocarbon fuel is burned in a vessel that contains 250. grams of water initially at…

A: Given : Initial temperature of water = 25.00 oC Final temperature of water = 26.55 oC Mass of water…

Q: The reactions of hydrocarbons are often studied in the petroleum industry. One such reaction is…

A: Given;

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

A:

Q: You determine that 143 J of energy as heat is required to raise the temperature of 94.28 g of zinc…

A: Specific heat capacity of a substance is amount of heat required to raise temperature of a substance…

Q: An unknown organic compound is being proposed as an alternative to gasoline. The enthalpy of…

A: Density is defined as the ratio of mass of any substance to that of volume of that substance at a…

Q: Predict the effect of decreasingthe temperature on theamounts of reactants in the following…

A: Temperature is the factor that affects the rate of the reaction. Temperature effect depends on the…

Q: Iron converts to iron (iii) oxide in this reaction: 2 Fe (s) + 3 CO (g) -> Fe2O3 (s) + 3 CO2 (g)…

A:

Q: Given the following equations and H values, determine the ΔH for the reaction:…

A:

Q: 1. 6FEO + 02 g) →2F@;O4 (6) 2Fe304 (3) AH=-3607.2 kJ 2. 4Fe;O4 (3) + 02 (3)→6FE;O3 (5) AH2 = +3408 3…

A: Introduction: Hess’s law states that enthalpy is a state function according to this law when a…

Q: In an experiment, a 0.7520 g sample of 1,2-benzenediol (C6H6O₂) is burned completely in a bomb…

A: we have to calculate the molar heat of combustion for 1,2-benzenediol

Q: Using the three reactions below, determine change in enthalpy (kJ) for the combustion of ethane…

A:

Q: required to raise the temperature of a 86.0 g sample of ethanol from 198.0 K to 300.0 K. The…

A: The answer is given as follows

Q: 4Al(s) + 302(g)- - 2AI2O3(s) AH°rxn = -3351.4 kJ How much energy is transferred when 15.5 g of Al2O3…

A: We can solve the problem by determining the moles of aluminium oxide produced. Data given : ∆H0 = -…

Q: The combustion reaction of 1-pentanol is: C5H11OH(l)+152O2(g)→5CO2(g)+6H2O(l) The heat of…

A:

Q: 2. Cite some factors that could possibly affect the AH in this experiment. 3. Glucose, C6H12O6, is…

A:

Q: cooking oil is 1.75 J/(g⋅°C).1.75 J/(g⋅°C). How much heat energy is needed to raise the temperature…

A: Heat of reaction is difference of energy of product  and energy of Reactant. If heat of reaction is…

Q: The complete combustion of propane, C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O(l) has DH = -2220 kJ. How…

A: In this question, we want to determine how much heat released when 20.0L C3H8 burn in the presence…

Q: Q12) What mass (in grams) of butane (C4H10) is required to produce 998 kJ of heat as a result of…

A: According to the reaction, 2658 KJ heat is produced from = 1 mol butane  1 KJ heat is produced from…

Q: The heat of combustion of 1-pentanol is -3331 kJ/mol. Given the following information, calculate the…

A:

Q: Use the following data to determine the AH° for the conversion c C(s,diamond) +O,(g) CO,(g) AH°=…

A: We will add all three equation to get final equation.

Q: How much heat in kJ is evolved or absorbed?  Burning of 15.5g of propane:  C3H8(g) + 2 H2O (l) -->…

A:

Q: . The heat of combustion of fructose, C6H12O6, is -2812 kJ. Using  the following information,…

A: For the given reaction,

Q: Complete combustion of 1 mol of acetone C3H6O2 liberates 1790 KJ; C3H6O(l)  + 4O2(g) à 3CO2(g) +…

A: Enthalpy is the amount energy absorbed or released in a process.The enthalpy change in a system (del…

Q: 7. Methanol, ethanol, and n-propanol are three common alcohols. When 1.00 g of each of these…

A: (a)The heat combustion value of methanol is determined as follows,

Q: What is the change in the enthalpy (in kJ) for the complete combustion of 39.0 g of fructose,…

A: Heat of reaction or enthalpy change∆Hrxn is defined as heat released and absorbed during a reaction.…

Q: The addition of hydrobromic acid to a silver nitrate solution precipitates silver bromide according…

A: we need to calculate ∆Hrxn

Q: Zinc metal reacts with hydrochloric acid according to the following balanced equation:…

A: •in coffee cup calorimeter the heat exchange is equal to change in enthalpy of the reaction.   • in…

Q: Calculate the final temperature that results when A 12.6 g sample of water at 22.9 0C absorbs 875 J…

A: The given two problem can be solved by this equationQ=m.c.△TWhereQ=Amount of heat absorbed or lost…

Q: Zinc metal reacts with HCl according to the following balanced equation: Zn(s) + 2HCI(aq) ZnCl2(aq)…

A: Given , Initial temp= 21.60 °C Final temp = 24.60 °C  Mass of Zn = 0.14 g Molar mass = 65.38 g…

Q: 3. Complete combustion of 1.00 mol of ace tone (C3H6O) liberates 1790 kJ:  C3H6O(ℓ) + 4O2(g) --->…

A: When a compound or substance reacts chemically with oxygen present in the air then this type of…

Q: When 2 moles of C2H6(g) react with O2(g) to form CO2(g) and H2O(g) according to the following…

A: Given : Amount of heat evolved in the reaction = 2.86 X 103 KJ And moles of C2H6 reacted = 2 moles

Q: When 0.514 g of biphenyl, C12H10, undergoes combustion in a bomb calorimeter, the temperature rises…

A: Given : Mass of C12H10 reacting = 0.514 g Initial temperature = 25.8 oC Final temperature = 29.4 oC…

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: The reactions of hydrocarbons are often studied in the petroleum industry. One such reaction is…

A:

Q: A system gains 20.4 J of internal energy while doing 30.0 J of work. Does heat enter or escape from…

A: From first Law of Thermodynamics , the total change in internal energy of the system can be…

Q: how many calories are required to heat 100.0 grams of copper from 10.0°C to 100.0°C if the specific…

A: Given: The specific heat of Cu, (C) = 0.0930 cal/g-°C. The amount of Cu heated, (m) = 100 g. The…

Q: When 9.1 g of a  hydrocarbon is combusted in a bomb calorimeter the temperature of the calorimeter…

A: Given that, Amount of hydrocarbon combusted = 9.1 g Mass of water in calorimeter = 731 g Heat…

Q: Constants Periodic Table Zinc metal reacts with hydrochloric acid according to the following…

A:

Q: The standard heat of combustion of a fuel (molar mass of 46 g/mole) is 1372 kJ/mol. How much heat…

A: Given that Molar mass = 46 g/mol Heat of combustion (ΔH) = –1372 kJ Heat liberated by 25.0 g sample…

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: An unknown sample of coal is burned in an apparatus with a calorimeter constant of 0.73 kj/°C. When…

A:

Q: The value of ΔH0 for the reaction CH3OH(l) → CO(g) + 2H2(g) is +128.1 kJ. Determine the heat…

A: Given, The balanced chemical equation is given below, CH3OH(l) → CO(g) + 2H2(g) ΔH0=+128.1 kJ

Q: Suppose 9.44 g of calcium chloride, CaCl2, (MM=111.0 g/mol) is added to 222. g water at 21.84oC in a…

A:

Q: A 1.917 g sample of a new organic material is combusted in a bomb calorimeter. The temperature of…

A: The question is based on the concept of chemical thermodynamics. we have to calculate heat of…

Q: How much energy is liberated when 600.2g of O2 is reacted with propane in a combustion tank. Assume:…

A: The balanced reaction taking place is given as, => C3H8 (g) + 5 O2 (g) -------> 3 CO2 (g) + 4…

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.