Question

If the total amount of energy required to change a substance to a different phase and temperature is positive, then does that mean that the

phase change has moved in the direction of solid gas or gas - solid and has the temperature increased or decreased?
A. solid-gas temperature increase
B. solid-gas temperature decrease
C. gas sold temperature increase
D. gas - solid temperature decrease

Answer 1

It would be A. Solid-gas temperature increases ( think of a block of ice, you have to increase temperature to make it melt, then the water would evaporate into a gas)