A steel bottle contains argon gas at STP.What is the final pressure if the temperature is changed to 115°C?
A)0)704 atm
B)0)768 atm
C)1)30 atm
D)1)42 atm

Question

Quizplus · Accepted Answer

According to the Ideal Gas Law, PV=nRT, if the number of moles of gas and the volume of the container remains constant, then the pressure and temperature are directly proportional. As the temperature increases from 273 K (STP) to 388 K (115°C or 115+273), the pressure will also increase in proportion. Using the formula P1/T1=P2/T2 and substituting the values, we get P2 = (P1*T2)/T1 = (1 atm * 388 K)/273 K = 1.42 atm. Therefore, the final pressure is 1.42 atm or approximately 1.4 atm. The correct choice is D).

A Steel Bottle Contains Argon Gas at STP