Question

study this graph. using the letters provided, indicate where the temperature is increasing.
a, b, c
c, d, e
e, g, f
a, c, e

Explanation:

Step1: Recall heat - temperature relationship

When heat energy is added to a substance and there is no phase - change, the temperature increases. During phase - changes (melting, boiling etc.), the temperature remains constant while heat is being absorbed.

Step2: Analyze the graph

In regions where the substance is not undergoing a phase - change, the temperature will increase with the addition of heat energy. Typically, in a heating curve, flat sections represent phase - changes and non - flat sections represent temperature increases. Without seeing the actual graph details about phase - changes, we assume that non - phase - change regions are where temperature increases.

Answer:

A, C, E (assuming these are the non - phase - change regions where heat addition leads to temperature increase)