For the process described, compare ΔH with ΔE of the system.

A solid yields a mixture of gases in an exothermic reaction that takes place in a container of variable volume.

A. ΔH is less than (more negative) Δ E of the system.

B. ΔH is greater than ΔE of the system.

C. ΔH is equal to ΔE of the system.

D. can't be determined without more information

Answer: Option A.

∆H is less than (more negative) ∆ E of the system

Explanation:

From the question, a solid yield a mixture of gases in an exothermic reaction. Exothermic reaction is a process that give out energy after the reaction, it is mostly represented by negative H, that is enthalpy.

The enthalpy is negative (∆H) when the reaction release energy meaning that the energy that must be absorbed to break the bonds of the reactants is greater than than energy released when new bonds are formed.

From the reaction more heat is released.