Question

Latent heat of vaporisation of water is ___________.

• A. 270 Cal/g
• B. 540 Cal/g
• C. 80 Cal/g
• D. 180 Cal/g

Answer 1

The correct option is B

540 Cal/g

• Latent heat of vaporization of water: It is defined as the amount of heat required to convert 1g of water into steam at 100⁰C without any change in temperature.
• Latent heat of vaporization of water = 540 Cal/g.
• It means If liquid water at 100°C is changed into steam, the heat added (the latent heat of vaporization) is 540 calories for every gram of water.
• Hence (B) will be the correct option.