which statement describes the appearance of a temperature - vs. - time graph?\na horizontal line shows that…

which statement describes the appearance of a temperature - vs. - time graph?\na horizontal line shows that the temperature increases at a constant rate over time.\na vertical line shows that the temperature decreases at a constant rate over time.\nhorizontal lines where the temperature is constant during phase changes connect upward - sloping lines where the temperature increases.\nhorizontal lines where the temperature increases are connected by upward - sloping lines where the temperature is constant for each phase.\ndone

which statement describes the appearance of a temperature - vs. - time graph?\na horizontal line shows that the temperature increases at a constant rate over time.\na vertical line shows that the temperature decreases at a constant rate over time.\nhorizontal lines where the temperature is constant during phase changes connect upward - sloping lines where the temperature increases.\nhorizontal lines where the temperature increases are connected by upward - sloping lines where the temperature is constant for each phase.\ndone

Answer

Brief Explanations:

In a temperature - vs - time graph, during phase changes (like melting or boiling), the temperature remains constant while heat is being absorbed or released. This is represented by horizontal lines. Between phase changes, when the substance is in a single phase and being heated or cooled, the temperature increases or decreases linearly with time, shown by upward - sloping or downward - sloping lines respectively.

Answer:

C. Horizontal lines where the temperature is constant during phase changes connect upward - sloping lines where the temperature increases.