Question

How much heat is required to raise the temperature of 20 g of mercury from 20 °C to 30 °C?

Answer 1

Given:

Difference in temperature = 20°C to 30°C

Mass of mercury = 20 g

Specific heat of mercury = 140 J/kg K

To find:

How much heat is required to raise the temperature of 20 g mercury from 20°C to 30°c?

Solution:

Since the heat required is:

Q = mcΔT

Q = 0.02 * 140 * (30-20)

Q = 28 J

Therefore, the amount of heat required to raise the temperature of 20 g of mercury from 20 °C to 30 °C is 28 J.

Answer 2

Given:

        Difference in temperature = 20°C to 30°C

        Mass of mercury = 20 g

        Specific heat of mercury = 140 J/kg K

 

Solution:

Since the heat required is:

  Q = mcΔT

     = 0.02 * 140 * (30-20)

      = 28 J

Therefore, the amount of heat required to raise the temperature of 20 g of mercury from 20 °C to 30 °C is 28 J.