If you have two reaction solutions (with the same reactants) at the same concent

Question

If you have two reaction solutions (with the same reactants) at the same concentration, pressure, temperature etc. and the only difference is the volumes (one is bigger, one is smaller in volume), how will the change in temperature (T) for both solutions compare? Will one release more heat than the other, or will they be equal?

I did a practice problem that says the T would be equal for both volumes, which confuses me. Hess's law says that if you double a chemical reaction, twice as much heat is released/absorbed. The practice problem answer suggests that heat released is independent of the volumes of reactants used and when the concentrations are the same substance. Wouldn't volume affect the magnitude of the temperature change? (since there are more/less of the reactants present)? I would really appreciate any clear and detailed explanation you have.

Explanation / Answer

Ans 1 :

Since the all the things are constant including the concentration of reactants , only the volumes are different , so i assume also the number of moles will be different.

The one with lesser volume will have less number of moles , and the one with more volume will have higher number of moles.

The heat of the reaction depends on the number of moles of reactants , so the one with more volume will release more heat than the other.

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