As entropy increases as we move from solid to liquid to gas, so S is clearly negative for B, D and E. In case of no change in the state, the entropy increases with the number of particles, so S is negative for C and positive only for A. Solution As entropy increases as we move from solid to liquid to gas, so S is clearly negative for B, D and E. In case of no change in the state, the entropy increases with the number of particles, so S is negative for C and positive only for A..