Question

Two accidents are happened. The first one with water at 100°C and the second one with steam at 100°C.

1. Which is dangerous burn due to water at 100°C, and bum due to steam at 100°C? Why?

2. Latent heat of vapourisation of water to 536 cal/g. Explain the idea of latent heat of vopourisation.

3. Find the heat required to convert 1g of ice at 0°C to steam at 100°C is

Answer 1

1. Burn due to steam is more dangerous, because heat content in steam is very high compared to 100°C water.

2. Latent heat of vapourisation is the amount of heat required to change the state of 1 kg water in to vapour.

3. Q = ML + MC∆Q + ML¹

= 716 cal.