Question

A water distiller which is used to purify water. The distiller boils water and then condenses most of the water vapour back to water. (a) The water distiller is filled with 5.0 kg of water at 20 °C The specific heat capacity of water = 4 200 J/Kg °C Calculate the energy needed to raise the temperature of the water to 100 °C ___________________________________________________________________

Answer 1

Energy needed 1680kJ

Step-by-step explanation:

The quantity of heat required to raise the temperature of water to 100 degrees is expressed as

`Q= mc(T2-T1)`

Given data

mass of water = 5kg

initial temperature T1= 20 °C

final temperature T2= 100 °C

Specific heat capacity of water= 4 200 J/Kg °C

`Q= 5* 4 200(100-20)\\Q= 21000(80)\\Q= 1680000\\Q= 1680kJ`