i. What is the ratio of the number of molecules of the gases in flask A to flask B?

Question

For an experiment, a scientist fills different gases in four flasks as shown below:

i. What is the ratio of the number of molecules of the gases in flask A to flask B? 

ii. Calculate the pressure exerted by nitrogen gas in flask B if the temperature is doubled. 

iii. If the scientist transfers the gas in flask D to another flask of 2.5 L at 1 atm pressure, what will be the temperature of the gas in the new flask?

Answer 1

i. 1:1 

ii. P ∝ T (when V and n are constants) 

∴ If temperature is doubled, pressure also doubles. 

∴ P = 2 atm

iii. \(\frac{V_1}{T_1}\) = \(\frac{V_2}{T_2}\) (when P and n are constants)

∴ \(\frac{1}{298}\) = \(\frac{2.5}{T_2}\)

∴ T₂ = 745 K