A system which undergoes an adiabatic change (i.e., q = 0) and has work done on it by the surroundings has

Question

a. w < 0, ΔU = 0
b. w < 0, ΔU < 0
c. w > 0, ΔU < 0
d. w > 0, ΔU > 0
e. w < 0, ΔU > 0

Answer 1

dE = q+w.
If q = 0, then
dE = w
If work is done on it by the surroundings then w is + and that makes dE +. Wouldn't that be d?