A student forgets to add the reaction mixture to a flask at 27C. However he placed the flask on the flame. After a lapse of time he recorded the temperature of the flask with the help of a pyrometer and it was found to be 477C. What fraction of air would have been expelled out?
Asked by neelam827001
| 26th Jul, 2014,
11:35: AM
Expert Answer:
Method – 1 :
According to Ideal gas equation PV = nRT
If initial no. of moles of gas in V lit container = 1
Method – 2 :
Suppose volume of vessel = V cm3
i.e. volume of air in the flask at 27 °C = V cm3
According to Charle’s law,
∴ Since volume gas is equal to volume of container and during heating volume of
container will not increase.
According to Ideal gas equation PV = nRT
If initial no. of moles of gas in V lit container = 1
i.e. volume of air in the flask at 27 °C = V cm3
According to Charle’s law,
∴ Since volume gas is equal to volume of container and during heating volume of
container will not increase.
Answered by Hanisha Vyas
| 30th Jul, 2014,
12:50: PM
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