A student forgot to add the reaction mixture to the round bottomed flask at 27oC but instead he/she placed the flask on the flame. After a lapse of time, he realized his mistake, and using a pyrometer he found the temperature of the flask was 477oC. What fraction of air would have been expelled out?
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The initial temperature T=27oC=27+273K=300K The final temperature T′=477oC=477+273K=750K The inital volume is V L and the final volume is V' L. VV′=TT′ VV′=300750 VV′=25′ The fraction of air expelled is 1−VV′=1−25=35.
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