Question

8 A balloon contains a fixed mass of gas.
(a) Explain, in terms of the momentum of molecules, how the gas in the balloon exerts a pressure.
(b) Explain, in terms of molecules, why the pressure of the gas increases when the volume of the balloon decreases. The temperature of the gas is constant.
(c) The initial volume of the gas is 500 cm3 and its pressure is 1.1x 105 Pa. The volume is reduced to 200 cm3. The temperature of the gas is constant.
Calculate the new pressure.

Pressure = ...........................................................

Answer 1

Answer:

Dimensional analysis is the analysis of the relationship between different physical quantities by tracking their physical 'dimensions' as calculations are performed. Dimensions are usually expressed in terms of the SI base quantities such as mass ([M]), length ([L]) and time ([T]).