QUESTION 15 For which of the following reactions would the h

QUESTION 15 For which of the following reactions would the heat of reaction equal the heat of formation for H20? O H+ + OH- H2O . . CH4 + O2 CO2 + 2H2O 0H2 + 1/2O2 H2O H2O2 H2O + 1 /2 02

Solution

The standard enthalpy of formation is a measure of the energy released or consumed when one mole of a substance is created under standard conditions from its pure elements.

Heat of reaction equal the heat of formation for H2O

H2 + 1/2 O2 ---------> H2O