From this graph, one should conclude that
A)most of the energy input into the system goes toward changing temperature not changing state.
B)most of the energy input into the system goes toward a more ordered, rigid, molecular structure.
C)none of these options are correct.
D)most of the energy input into the system goes toward changing state, not to change temperature.

Question

From this graph, one should conclude that 
A)most of the energy input into the system goes toward changing temperature not changing state. 
B)most of the energy input into the system goes toward a more ordered, rigid, molecular structure. 
C)none of these options are correct. 
D)most of the energy input into the system goes toward changing state, not to change temperature.

Quizplus · Accepted Answer

The graph shows that the energy input is mostly used to change the state of the substance, as there is a steep slope during the phase change. On the other hand, the change in temperature during this period is relatively small. Therefore, option D is the best choice.

From This Graph, One Should Conclude That