Latent Heat or Hidden Heat

The latent heat of vaporization of a substance is always:

The phenomenon of refreezing the water into ice on removing the increased pressure is called

Which of the following undergo sublimation?

The graph represents

A student takes $50 \mathrm{g}$ wax (specific heat$\left.=0.6 \mathrm{kcal} \mathrm{kg} °\mathrm{C}\right)$ and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are respectively

A piece of ice (heat capacity $=2100 \mathrm{J} {\mathrm{kg}}^{-1} °{\mathrm{C}}^{-1}$ and latent heat $=3.36\times {10}^5 \mathrm{J} {\mathrm{kg}}^{-1}$ ) of mass $m$ grams is at $-5°\mathrm{C}$ at atmospheric pressure. It is given $420 \mathrm{J}$ of heat so that the ice starts melting. Finally, when the ice-water mixture is in equilibrium, it is found that $1 \mathrm{g}$ of ice has melted. Assuming there is no other heat exchange in the process, the value of $m$ is

In an energy recycling process, $x \mathrm{gm}$ of steam at $100°\mathrm{C}$ becomes water at $100°\mathrm{C}$ which converts $y \mathrm{gm}$ of ice at $0°\mathrm{C}$ into water at $100°\mathrm{C}$ . The ratio $\frac{x}{y}$ will be

$100 \mathrm{g}$ of ice at $0°\mathrm{C}$ is mixed with $100 \mathrm{g}$ of water at $100°\mathrm{C}$ . What will be the final temperature of the mixture?

Specific heat capacity of water is $s_{\mathrm{w}}=1 \mathrm{cal} {\mathrm{g}}^{-1} °{\mathrm{C}}^{-1}$

Specific heat capacity of ice is $s_i=0.5 \mathrm{cal} {\mathrm{g}}^{-1} °{\mathrm{C}}^{-1}$

Latent heat of the water $L=80 \mathrm{cal} {\mathrm{g}}^{-1} °{\mathrm{C}}^{-1}$