During an adiabatic change of state for an ideal gas 20 J of work are done on the surroundings. During this change, the temperature decreases from 400 K to 380 K. What is ΔU, ΔS and Q for this change of state?

A. ΔU = 20J, ΔS = 0, Q = 0

B. ΔU = -20J, ΔS = 0, Q = 0

C. ΔU = 20J, ΔS = 20/390 J/K, Q = 0

D. ΔU = -20J, ΔS = 20/390 J/K, Q = 0

E. ΔU = 20J, ΔS = 20/390 J/K, Q = 20 J

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