Question

Draw a cooling graph of water as it passes from 20°C to –20°C. The y-axis should be temperature in degrees Celsius and the x-axis should be time

Answer 1

Answer:

Kindly, see the attached image.

Explanation:

As clear in the attached image:

• It represents the cooling curve of water.

• It starts from 20°C, the water exists in the liquid phase.

• With time the temperature is decreased, reaching 0°C, the two phases (liquid and solid) are co-exist.

• Then, with further cooling and under 0°C reaching -20°C, all the water are exist in the solid phase (Ice).

Kindly, see the attached image that clarify the cooling graph of water as it passes from 20°C to –20°C.