Question

Which of the following plays an important role when water is used as a coolant?

• A. Specific heat capacity
• B. Melting point
• C. Boiling point
• D. Density

Answer 1

The correct option is A

Specific heat capacity

The explanation for the correct answer:

Option A

1. When water is used as a coolant the concept of specific heat comes into play which is the amount of heat required to raise the temperature of a certain mass of a substance by 1 unit.
2. This is because coolant is used to regulate heat in a device and so to regulate heat, the coolant must be able to tolerate high levels of heat, due to the high specific heat water is best suitable for coolant.

The explanation for the incorrect answers:

Option B

The melting point is defined as the temperature at which solid and liquid phases are in equilibrium this is not related to water used as coolant therefore it is incorrect.

Option C

The boiling point is the temperature at which the vapor pressure of a liquid is equal to the external pressure this is also not related to water used as coolant therefore it is incorrect.

Option D

The density of water is also not related to the water used as the coolant. Therefore it is also incorrect.

Hence Option A is incorrect