Question

analyzing the time/temperature graph for an experiment on phase changes for water. at what temperature does the first phase change occur? 50 degrees celsius 0 degrees celsius 100 degrees celsius 140 degrees celsius

Explanation:

Step1: Identify phase - change on graph

In a temperature - time graph for water, the first phase change is melting.

Step2: Recall melting point of water

The melting point of water is 0 degrees Celsius.

Answer:

0 degrees Celsius