Question

In thermal power stations, steam is preferred to convert heat to electric energy because

• A. steam is good conductor of heat
• B. steam is good conductor of electricity
• C. steam can flow quickly
• D. every gram of steam can give $2260J$ of heat.

Answer 1

The correct option is D every gram of steam can give $2260J$ of heat.

In thermal power stations, steam is preferred to convert heat to electric energy because every gram of steam can give 2260 J of heat.

The latent heat of vaporization of water is $2260J/g$ i.e. latent heat of steam is $2260J/g$ which is very high, So steam is used to convert heat into electric energy.