All the heat generated in a 5Ω Ω resistor by 2A flowing for 30 seconds is used to evaporate 5g of a liquid at its boiling point. Which of the following is t...

All the heat generated in a 5$\Omega$ resistor by 2A flowing for 30 seconds is used to evaporate 5g of a liquid at its boiling point. Which of the following is the correct value of the specific latent heat of the liquid?

Answer Details

Heat energy = electrical energy

mL = I2Rt

5 x L = 2 x 2 x 5 x 30

L = 120Jg-1