State two factors that affect the rate of evaporation of a liquid. Explain the term latent heat. Explain each of the following phenomena: On a dry day, water in a clay pot is cooler than water in a rubber container. Cooking of food is faster in a pressure cooker than in an ordinary pot.

The relationship between the speed of sound ($v$) and absolute temperature ($T$) is given by $v \propto \sqrt{T}$.
Given $v_1 = 240 \text{ m/s}$ at $T_1 = 102 \text{ °C}$.

$$T_1 = 102 \text{ °C} + 273.15 = 375.15 \text{ K}$$

We are given $v_2 = 310 \text{ m/s}$ and need to find $T_2$.

$$\frac{v_1}{v_2} = \sqrt{\frac{T_1}{T_2}}$$ $$\frac{240 \text{ m/s}}{310 \text{ m/s}} = \sqrt{\frac{375.15 \text{ K}}{T_2}}$$

Square both sides of the equation:

$$\left(\frac{240}{310}\right)^2 = \frac{375.15}{T_2} \\ \left(\frac{24}{31}\right)^2 = \frac{375.15}{T_2} \\ \frac{576}{961} = \frac{375.15}{T_2} \\ T_2 = 375.15 \text{ K} \times \frac{961}{576} \\ T_2 \approx 625.06 \text{ K}$$

$$T_2 \text{ (°C)} = 625.06 \text{ K} - 273.15 \\ T_2 \text{ (°C)} \approx 351.91 \text{ °C}$$

The temperature is approximately $\boxed{\text{352 °C}}$.

11. (a) State two factors that affect the rate of evaporation of a liquid.

1. Temperature: A higher temperature increases the kinetic energy of liquid molecules, allowing more of them to escape into the vapor phase.
2. Surface area: A larger exposed surface area allows more molecules to escape from the liquid's surface per unit time.

11. (b) Explain the term latent heat.

Latent heat is the energy absorbed or released by a substance during a phase change (e.g., melting, boiling, freezing, condensation) without a change in its temperature. This energy is used to break or form intermolecular bonds, changing the state of matter rather than increasing or decreasing its kinetic energy.

11. (c) Explain each of the following phenomena: