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A gas at 100.0 kPa and 39.1°C fills a flexible container with an initial volume of 2.66 L. If the temperature is raised to 62.2°C and the pressure increased to 544.0 kPa, what is the new volume in Liters?0.5250.6300.4100.462

Sagot :

We have a gas that changes its volume, pressure and temperature. We will assume that there is no entry or exit of matter from the container. Therefore the moles will remain constant.

We have two states, an initial state (1) and a final state (2) for the gas. If we assume that the gas behaves as an ideal gas we can apply the following equation:

[tex]PV=nRT[/tex]

Where,

P is the pressure of the gas, in atm

V is the volume of the gas, in liters

n is the number of moles of the gas

T is the temperature of the gas, in Kelvin

R is a constant, 0.08206 atm.L/mol.K

For each state we will have that the equation will be:

Initial state (1)

[tex]\begin{gathered} P_1V_1=nRT_1 \\ nR=\frac{P_1V_1}{T_1} \end{gathered}[/tex]

P1 = 100.0kPa = 0.987atm

V1 = 2.66L

T1 = 39.1°C = 312.25K

Final state (2)

[tex]\begin{gathered} P_2V_2=nRT_2 \\ nR=\frac{P_2V_2}{T_2} \end{gathered}[/tex]

P2 = 544.0kPa = 5.369atm

T2= 62.2°C = 335.35K

V2 = Unknown

Since R and n are constant and equal in both states of the gas, we can equate the equations and we have:

[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]

We clear V2 and replace the known data:

[tex]V_2=\frac{P_1V_1}{T_1}\times\frac{T_2}{P_2}[/tex][tex]\begin{gathered} V_2=\frac{0.987atm\times2.66L}{312.25K}\times\frac{335.35K}{5.369atm} \\ V_2=0.525L \end{gathered}[/tex]

Answer: The new volume in liters will be 0.525