Question

A sample of a gas occupies a volume of 1.820 liters at STP. What pressure (in atm), would it exert if transferred to a 1.425 liter vessel if the system was held at 33 ^oC for the entire experiment?

Answer 1

Given data, stem was Initial Volume of a gas sample , V = 1.820 lit. During entire experiment the system held at 33°c. So, initial temperature is also 33°c = (334273) * = 306k. the is gas at STP (standard temperature and pressure). According to JUPAC at STP, presawee (Ⓡ) = 1 bar bogators = 0.987 atm Let the number of moles of gas Now, from ideal gas At first, lan av n PV= MRT R = Universal gas const. PN RT = 0.082 lit-atmmole 0.987atm x 1.820 lit 0.082 lit- atm mot k' x 306 k 3 0.07159 mole ~ 0.072 mole Now , the gas is transferred to the volume, - 1.425 lit. Let the pressure a P'atm

2. P'v' = nRT a, P' MRT VT 0.072 mote x 0.082 lit-atmmdelky x 3o6k 1.425 lit - 1.2678 atm - the gas would exert 1.26 78 atm pressure if it transferred to 1.425 lit.