Question

heat of reaction for CU + half O2 gives CO2 at constant volume is -67.7 kilo calorie at 17 degree Celsius the heat of reaction at constant pressure at 17 degree celsius is​

Answer 1

The heat of the reaction at constant pressure is equal to -67.41 Kcal.

• The heat of a reaction at constant volume is equal to the change in the internal energy(ΔU) of the reaction.
• The heat of a reaction at constant pressure is equal to the change in enthalpy(ΔH) of the reaction.
• A reaction involving gaseous reactants and products satisfies the the equation - ΔH = ΔU + Δn(g)RT
• Δn(g) for the given reaction is equal to 1/2 since the product has 1 mole of gaseous CO2 and the reactants has 1/2 mole of gaseous O2.
• Substituting the values in the equation we get the desired answer.

Answer 2

Explanation:

constant v mean deta U...and constant p mean deta H