How Does Temperature and Pressure Affect Balloon Volume?

[v3ra]

A balloon is filled up with air to a volume of 1.15 L at 296.5 K.* What does the volume change to if the balloon is taken outdoors where the temperature is 278.4 K and the pressure is half of what it was indoors?

V2 = (P1V1T2) / (T1P2)


How do I find the initial pressure at 296.5 K if I know that at STP the pressure is 760 mm Hg at 273.15 K?

 

[Saitama]

A balloon is filled up with air to a volume of 1.15 L at 296.5 K.* What does the volume change to if the balloon is taken outdoors where the temperature is 278.4 K and the pressure is half of what it was indoors?

V2 = (P1V1T2) / (T1P2)


How do I find the initial pressure at 296.5 K if I know that at STP the pressure is 760 mm Hg at 273.15 K?

What remains constant in the process? Pressure, temperature, volume or moles?

If P is the initial pressure, what's the final pressure?

 

[v3ra]

The moles would remain constant... how does this help me?

 

[Saitama]

The moles would remain constant... how does this help me?

Right! So what are the initial moles and final moles? Write the expressions. Do not evaluate.