Problem: A process is carried out on a system at  constant external pressure. During the process 150. J of heat moves from the surroundings to the system, and the system expands, performing 400.J of work. The values for q, w, ΔU, and ΔH for the process are:a. q = -150.J, w = 400.J, ΔU = 250.J, ΔH = -150.Jb. q = 150.J, w = 400.J, ΔU = 550.J, ΔH = 550.Jc. q = 150.J, w = 400.J, ΔU = 550.J, ΔH = 150.Jd. q = 150.J, w = -400.J, ΔU = -250.J, ΔH = -250.Je. q = 150.J, w = -400.J, ΔU = -250.J, ΔH = 150.J

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FREE Expert Solution

We are being asked to identify ΔU or internal energy, heat (q), work (w) and enthalpy (ΔH). The internal energy (ΔE or ΔU) of a system can be calculated from the heat and work of the system. The relationship between internal energy, heat, and work is shown in the following equation:

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Problem Details

A process is carried out on a system at  constant external pressure. During the process 150. J of heat moves from the surroundings to the system, and the system expands, performing 400.J of work. The values for q, w, ΔU, and ΔH for the process are:

a. q = -150.J, w = 400.J, ΔU = 250.J, ΔH = -150.J

b. q = 150.J, w = 400.J, ΔU = 550.J, ΔH = 550.J

c. q = 150.J, w = 400.J, ΔU = 550.J, ΔH = 150.J

d. q = 150.J, w = -400.J, ΔU = -250.J, ΔH = -250.J

e. q = 150.J, w = -400.J, ΔU = -250.J, ΔH = 150.J