A heating coil of `2000 W` is immersed in water . How much time will it take in raising the temperature of `1 L` of water from `4^(@) C "to" 100^(@) C`? Only `80%` of the thermal energy produced is used in raising the temperature of water.

Explanation

To solve the problem of how much time it will take to raise the temperature of 1 liter of water from 4°C to 100°C using a heating coil of 2000 W, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Data:**
- Power of the heating coil, \( P = 2000 \, \text{W} \)
- Volume of water, \( V = 1 \, \text{L} = 1000 \, \text{g} \) (since the density of water is approximately \( 1 \, \text{g/mL} \))
- Initial temperature, \( T_i = 4^\circ C \)
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