Given that molar enthalpy of combustion of acetylene (C2H2, 26.04 g/mol) is -1299 kJ/mol at 25 C and 1 atm, which statement below is FALSE? C2H2(g)+ 5/2 O2(g) ----> 2CO2(g)+H2O(l) a. The enthalpy of the reactants is lower than that of the products. b. The amount of heat released is proportional to the amounts of reactants. c. When 104 g C2H2 combusts, about 5200 kJ of heat is released. d. The enthalpy of combustion per gram acetylene is -49.9 kJ/g e. To form 2 mol C2H2 and 5 mol O2 from 4 mol CO2 and 2 mol H2O, 2598 kJ of energy is required.

Physical Chemistry
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ISBN:9781133958437
Author:Ball, David W. (david Warren), BAER, Tomas
Publisher:Ball, David W. (david Warren), BAER, Tomas
Chapter2: The First Law Of Thermodynamics
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Given that molar enthalpy of combustion of acetylene (C2H2, 26.04 g/mol) is -1299 kJ/mol at 25 C and 1 atm, which statement below is FALSE?

C2H2(g)+ 5/2 O2(g) ----> 2CO2(g)+H2O(l)

a. The enthalpy of the reactants is lower than that of the products.

b. The amount of heat released is proportional to the amounts of reactants.

c. When 104 g C2H2 combusts, about 5200 kJ of heat is released.

d. The enthalpy of combustion per gram acetylene is -49.9 kJ/g

e. To form 2 mol C2Hand 5 mol O2 from 4 mol CO2 and 2 mol H2O, 2598 kJ of energy is required. 

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