Select the two options that best complete the following sentence. While water boils, the temperature is:90°C100°Cincreasingconstant

Break Down the Problem

1. Identify the process being described: boiling water.
2. Determine the temperature characteristics during boiling.

Relevant Concepts

1. Boiling Point of Water: At standard atmospheric pressure, water boils at 100°C.
2. Phase Change: During the phase change from liquid to gas, the temperature remains constant.

Analysis and Detail

1. When water reaches its boiling point, it does not increase in temperature but instead remains at that boiling point until all the water has transitioned to steam.
2. This means that while boiling occurs, the temperature of the water remains constant at 100°C.

Verify and Summarize

1. The options "100°C" and "constant" are correct as they reflect the characteristics of boiling water under standard atmospheric conditions.

Final Answer

The two options that best complete the sentence are: 100°C and constant.