Question

Calculate the amount of heat needed to increase the temperature of 200 grams of water at 10°C to 95°C.

Answer 1

Given:

The mass of water is m = 200 g

The initial temperature of the water is

`T_i=\text{ 10}^(\circ)\text{ C}`

The final temperature of the water is

`T_f=\text{ 95}^(\circ)C`

Required: The amount of heat needed to increase the temperature.

Step-by-step explanation:

The amount of heat can be calculated by the formula

`Q=mc(T_f-T_i)`

Here, c is the specific heat of the water whose value is

`c=1\text{ cal/g }^(\circ)C`

On substituting the values, the amount of heat can be calculated as