1.   What is the meniscus?

2.   Why does water boil faster if I place a lid on top of the pot?

3.   On a day when atmospheric pressure is 760 mmHg, a defective barometer tube of uniform internal diameter contains mercury to a height of 740 mm. The 60 mm of space above mercury is occupied by some air. What is the true atmospheric pressure on another day when this barmeter reads 725 mm?

4.   There is cylinder filled by a gas, with area A. In the cylinder, there is piston with mass m on top which makes the height of the piston from the bottom of the cylinder a distance h. How much weight should we add onto the piston to reduce the height to half of its initial value? Assume the air pressure to be P_o and the temperature of the gas is always room temperature.

5.   Initial temperature of one mole of gas is 27 ⁰C. Adiabatically, its volume becomes 2/3 of its initial original volume. Find the ratio between final and initial pressures and calculate the final temperature.

6.   A glass bulb of volume 400 cm³ is connected to another of volume 200 cm³ by means of a tube of negligible volume. The bulbs contain dry air and are both at a common temperature and pressure of 20 ⁰C and 1.0 atm. The larger bulb is immersed in steam at 100 ⁰C; the smaller, in melting ice at 0 ⁰C. Find the final common pressure.

7.   How is a hot air balloon lifting off the ground an example of Charles' law?

State three postulates of the kinetic theory of gases. (3 marks)

1.0 mole of gas at 20⁰C and 1.0 x 10³ Pa with specific heat capacity 20.9 JK^-1mol^-1 at constant volume, in a closed insulated cylinder, is rapidly heated by a small explosion.
If the explosion releases 5.0 kJ of energy and the volume remains constant, determine the final temperature of the gas. (4 marks)
Determine the final pressure of the gas after the explosion, if the volume remains constant.
(2 marks)