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Calculating volume of a gas?
A balloon is inflated to a volume of 27.5 L at a pressure of 748 mmHg and a temperature of 29.9 ∘C. The balloon rises in the atmosphere to an altitude where the pressure is 390. mmHg and the temperature is -13.9 ∘C.
Assuming the balloon can freely expand, calculate the volume of the balloon at this altitude.
I keep getting the answer wrong, I don't know what I'm doing wrong.
1 Answer
- Trevor HLv 74 years ago
Use the combined gas equation. It is only necessary to convert temperature in °C to K
29.9°C = 29.9+273.15 = 303.05K
-13.9°C = -13.9 + 273.15 = 259.65K
Combined gas equation:
P1V1/T1 = P2V2/T2
748* 27.5/ 303.05 = 390*V2/259.65
V2 = 748*27.5*259.65 / 390*303.05
V2 = 44.3L
If you have done some calculations , but you keep getting the wrong answer , it is a good idea to submit what you have done so that you can be guided on where your error is.
