Which of the following statements is true of the internal energy of a system and its surroundings during an energy exchange with a negative ∆Esys?
a. The internal energy of the system and the surroundings increases
b. The internal energy of the system and the surroundings decreases.
c. The internal energy of the system increases and the surroundings decreases.
d. The internal energy of the system decreases and the surroundings increases.
