A process is carried out at constant pressure.Given that 0 ΔH ΔE,
A)the system absorbs heat and expands during the process.
B)the system absorbs heat and contracts during the process.
C)the system loses heat and expands during the process.
D)the system loses heat and contracts during the process.

Question

A process is carried out at constant pressure.Given that 0 > ΔH > ΔE,
A)the system absorbs heat and expands during the process.
B)the system absorbs heat and contracts during the process.
C)the system loses heat and expands during the process.
D)the system loses heat and contracts during the process.

Quizplus · Accepted Answer

At constant pressure, ΔH = ΔE + PΔV. Since ΔH > ΔE, PΔV must be negative, indicating the system loses heat (ΔH < 0) and expands (ΔV > 0).

A Process Is Carried Out at Constant Pressure