If ΔH is positive, the process is which type of heat change?

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Multiple Choice

If ΔH is positive, the process is which type of heat change?

Explanation:
Enthalpy change tracks heat flow into or out of a system at constant pressure. A positive ΔH means the system has absorbed heat from its surroundings, which is the hallmark of an endothermic process. In other words, energy is put into the system as heat. By contrast, a negative ΔH corresponds to heat leaving the system (exothermic). Options like isothermal or adiabatic describe temperature behavior or heat transfer conditions rather than the sign of heat flow: an endothermic change specifically means heat is entering the system, so the positive ΔH is the telltale sign.

Enthalpy change tracks heat flow into or out of a system at constant pressure. A positive ΔH means the system has absorbed heat from its surroundings, which is the hallmark of an endothermic process. In other words, energy is put into the system as heat. By contrast, a negative ΔH corresponds to heat leaving the system (exothermic). Options like isothermal or adiabatic describe temperature behavior or heat transfer conditions rather than the sign of heat flow: an endothermic change specifically means heat is entering the system, so the positive ΔH is the telltale sign.

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