Which statement is true? a. the enthalpy for the formation for two moles of a substance is half of the enthalpy for the formation of one mole of the substance. b. the enthalpy of a reaction is the heat of reaction at constant volume. c. the enthalpy of a reaction is the negative of the enthalpy of the reverse reaction. d. the enthalpy of a reaction and the enthalpy of the reverse reaction are equal.

The statement C is true

Explanation:

A. The enthalpy for formation of two moles will be twice the enthalpy for formation of one mole.

B. The heat of the reaction at a constant volume is part of the enthalpy equation.

C. Yeah, because if the reaction for example produces heat then the reverse reaction will consume it because it needs energy to occur.

D. They are equal by module.

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