An electrical heater of 2 KW is used to heat 0.5kg of water in a...

An electrical heater of 2 KW is used to heat 0.5kg of water in a kettle of heat capacity 400J K-1. The initial water temperature is 20°C
neglecting heat loses: (I) how long will it take to heat the water to it's boiling point, 100°C ? (ii) starting from 20°C what mass of water is boiled away in 5mins? (assume for water, specific heat capacity= 4200j kg-1 k-1 and specific latent heat of vaporisation = 2*10 raise to power 6 j kg_1)?

In Physics
4 Answers Available
Asked by Emmanuel on 14th March, 2024