Answer to Question #283143 in Physics for Kimgcash

Question

2. The density of hydrogen gas at 0°C and IUPAC standard pressure (100 kPa) is 9.00 g/m3.

a) If 1g of hydrogen gas is heated to 200°C in frictionless cylinder, find the volume it

occupies.

b) State what effect friction would have on your answer to (a).

Answer 1

a) The initial volume is

$$V_1=m/\rho.$$

Apply the combined gas law (keep in mind the pressure did not change):

$$V_1T_2=V_2T_1,\\\space\\ V_2=V_1T_2/T_1=\dfrac{mT_2}{\rho T_1}=0.192\text{ m}^3.$$

b) The pressure would increase.