Question

What do you understand by the term ‘Specific Latent Heat of Fusion of iron is 40000 Jkg^-1’.

• A. 40000 J of heat is required to melt 1 kg of iron at its melting point without any change in its temperature
• B. 40000 J of heat is required to melt 1 kg of iron at any temperature
• C. 40000 J of heat is required to melt 1 g of iron at any temperature
• D. 40000 J of heat is required to melt 1 g of iron at its melting point without any change in its temperature
• E. 40000 J of heat is liberated in melting 1 kg of iron at its melting point without any change in its temperature

Answer 1

The correct option is A

40000 J of heat is required to melt 1 kg of iron at its melting point without any change in its temperature

To melt 1 kg of iron at its MP without any change in temperature, 40000 J of heat energy is required.