Question

Consider boiling water converting into steam. Under this condition, the specific heat of water is

• A. less than zero
• B. zero
• C. slightly greater than zero
• D. infinite

Answer 1

Answer: (D)

infinite

Answer 2

During conversion of water into steam, temperature remains constant $(\Delta \theta=0)$
For phase conversion $\Delta Q=m L=m s \Delta \theta$
or $s=\frac{L}{\Delta \theta}=\frac{L}{0}=\infty$
$[\because L \neq 0]$
where, $L$ is latent heat of steam.