By how much does the temperature of mercury increase? the specific heat of mercury is 140

Heat energy = 140 J = 20/1000 * sp. heat * (change in temp.)

= 20/1000 * 139 * temp. increase

= 2.78 * temp. incr.

Increase in temp = 100/2.78 = 35.97 K.

to raise the temp. of 20 g of water by 35.97 K

= 20/1000 * 4186 * 35.97

= 3011.5 J