Question

1) Picture a Styrofoam packing peanut in your hand. If you close your hand around it and squeeze, what are you doing to the pressure?

2) How does this affect the volume of the packing peanut?

3)By this example, what is the relationship between the pressure on an object and the volume of the object (direct relationship, inverse relationship, etc.)? Explain how you come to this conclusion.

4) Now let

Answer 1

1. We are increasing the pressure on the packet by pressing it.

2. The volume of the pavket will decrease.

3. There is inverse relation between the pressure and volume. If we double the pressure, volume becomes half.

We can justify it from the equation : PV = nRT where P = pressure, V = volume, n = no. of moles of gas, R = constant, T = temperature

At constant temperature, PV = constant

Hence if P increases, V decreases.

4. When the temperature decreases the pressure decreases. Because when temperature decreases the velocity of particles of gas decreases and they exert less forces on walls of tires or any container.

PV = nRT (v = constant) If T increases,P will also increase.

5. Thre is linear relationship. If temperature decreases, pressure increases linearly and vice versa.

6. It is common experience that when temperature increases, volume increases because molecules gain kinetic energy and they expand. ( pressure should be constant). The volume of the balloon will increase.

7. There is linear relation between V and T. If one increases other increases too.