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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 --> solid temperature increase
d. gas-> solid temperature decrease

1 Answer

13 votes

Answer:

solid-gas temperature decrease

User Jonathan Muller
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