Which statement describes the appearance of a temperature-vs.-time graph?
A. A horizontal line shows that the temperature increases at a constant rate over time.
B. A vertical line shows that the temperature decreases at a constant rate over time.
C. Horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases.
D. Horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

A temperature-vs.-time graph consists of horizontal lines indicating constant temperature during phase changes and upward-sloping lines showing temperature increases. This graph effectively illustrates how substances behave as they change states with added or removed heat. Understanding these components is crucial in interpreting thermal processes accurately. ;

Answered by GinnyAnswer | 2025-07-04

The correct description of a temperature-vs.-time graph is that horizontal lines indicate constant temperature during phase changes, while upward-sloping lines show increasing temperature. Therefore, the appropriate option is C: Horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases.
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Answered by Anonymous | 2025-08-19