Dry ice sublimes at -78.5 degrees C under 1atm pressure. Indicate the signs of change in H, G and S for the reaction CO2(g) --> CO2(s) (1ATM)
Temp: H G S
0 degree - (why neg?) + - (why is this neg? shouldn't it positive at 0 degrees isn't it still a solid? so less random)
-78.5 degree - 0 (why zero...) -
-100 degree - - -
Basically the change in free energy column I got all wrong and don't get how to find change in G and the q's I put in brackets can anyone help