(a) Calculate the heat that must be supplied to raise the temperature of 2 kg of water from `25^(@)`C to its boiling point at atmospheric pressure.The average specific heat of water in the range `25 - 100^(@)C` is 4.184 J `K^(-1) g^(-1)`.
(b)How long will a 2 kW heater take to supply this energy?

Explanation

To solve the problem, we will break it down into two parts as given in the question.

### Part (a): Calculate the heat required to raise the temperature of 2 kg of water from 25°C to its boiling point at atmospheric pressure.

1. **Identify the mass of water (m)**:
- Given mass of water = 2 kg
- Convert mass to grams (since specific heat is given in J K⁻¹ g⁻¹):
\[
...