Question

Calculate the energy needed to raise the temperature of 10 g of iron from 25 degree Celsius to 500 degree Celsius if specific heat capacity of iron is 0.45 Jg​ -1degree Celsius -1.

Answer 1

here change in temp.=500-25=475degree C

Total heat=mass×SHC×change in temp
=10×0.45×475
=2137.5degree celsius

Answer 2

We need 2137.5 J thermal energy to heat 10 g of iron to a temperature of 500°C

Explanation:

Given, mass of iron = 10 g

The specific heat capacity of iron is 0.450 J/g°C

Change in temperature = Final temperature - initial temperature = 500 - 25 = 475° Celsius

Thermal energy = mass × specific heat capacity × change in temperature

= 10 * 0.45 * 475

= 2137.5 joules