Question

Identify which of the following properties must be known in order to calculate the amount of heat required to melt $5.0kg$ of ice at $0^{0}C$?
I. The specific heat of water
II. The latent heat of fusion for water
III. The density of water

• A. I only
• B. I and II only
• C. I, II, and III
• D. II only
• E. I and III only

Answer 1

The correct option is D II only

As the ice is melting , it means the state of of ice is changing.The heat required $Q$ to change the state of mass $m$ of matter (ice) is given by

$Q=mL$ where $L$ is the latent heat of fusion for water,

we can see neither specific heat of water nor density of water is required for this state change , only mass of ice and latent heat are required.