Change in enthalpy ($\Delta$H)is best defined as
A)the sum of heat absorbed and work done.
B)the heat transferred at constant pressure.
C)the pressure change at constant temperature.
D)the measure of disorder in a system.
E)none of the above

Question

Quizplus · Accepted Answer

Change in enthalpy (ΔH) is defined as the heat absorbed or released by the system at constant pressure. It is represented by the formula ΔH = Qp, where Qp is the heat transferred at constant pressure. Therefore, option B is the correct choice. Option A is incorrect because work done is not always involved in enthalpy changes. Option C is incorrect because pressure change does not necessarily correspond to a change in enthalpy. Option D is incorrect because entropy, not enthalpy, is the measure of disorder in a system. Option E is incorrect because option B is the best choice.

Change in Enthalpy Δ\DeltaΔ H)is Best Defined as A)the Sum of Heat Absorbed and Sum

Change in Enthalpy $\Delta$ H)is Best Defined as
A)the Sum of Heat Absorbed and Sum