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I am not sure hwy the answer for this problem is C instead of either B or D which both seem like reasonable choices because they fulfill the requirements of having a "longer" line for the vaporization than fusion and same is true for the heat capacities. Can someone please enlighten me?
Last edited by zanekoch1A on Sun Jan 21, 2018 8:32 pm, edited 1 time in total.
I believe the question you are referring to is Problem 8.43. D is not the right answer choice because during a phase change, there is no change in temperature, yet in graph D, during melting and vaporization, there is a positive slope to the line, indicating that there is a temperature change when there shouldn't be. B is not the right answer choice because it states in the problem that the heat capacities for solid and gas are the same. That means that they should have the same slope in the graph. However, in B, the heating slope for the gas is at a different slope than the heating slope for the solid. C is the graph that satisfies the conditions indicated in the problem.
Gurkriti Ahluwalia 1K wrote:can someone therefore explain why a isn't the correct choice also??
I think A isn't the correct choice either because melting is supposed to occur twice as fast as vaporization. In A, it's the opposite; vaporization occurs twice as fast as melting.
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