The vapour pressure of a given liquid will increase if

Options

A. Temperature is increased
B. Surface area of liquid is increased
C. Volume of liquid in the container is increased
D. Volume of the vapour phase is decreased

Answer

To determine the conditions under which the vapor pressure of a given liquid will increase, we can analyze the factors affecting vapor pressure. Here’s a step-by-step solution:

### Step 1: Understand Vapor Pressure
Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid (or solid) phase at a given temperature. It indicates how readily a substance will evaporate.

**Hint:** Remember that vapor pressure is a measure of a liquid's tendency to evaporate.

### Step 2: Identify Factors Affecting Vapor Pressure
The vapor pressure of a liquid is influenced by several factors, including:

1. **Temperature**: As temperature increases, the kinetic energy of the molecules increases, leading to more molecules escaping the liquid phase into the vapor phase.
2. **Nature of the Liquid**: Different liquids have different vapor pressures at the same temperature due to differences in intermolecular forces.

**Hint:** Think about how heating a liquid affects the movement of its molecules.

### Step 3: Analyze the Effect of Temperature
When the temperature of a liquid is increased, the vapor pressure also increases. This is because more molecules have enough energy to overcome intermolecular forces and enter the vapor phase.

**Hint:** Consider how heating a pot of water causes steam to form.

### Step 4: Conclusion
Thus, the vapor pressure of a given liquid will increase if the temperature of the liquid is increased.

**Final Answer:** The vapor pressure of a given liquid will increase if the temperature is increased.