NEET-XI-Chemistry
05: States of Matter
- #11A student forgot to add the reaction mixture to the round bottomed flask at 27 °C 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 477 °C. What fraction of air would have been expelled out?
Ans : Let the volume of the round bottomed flask be V.
Then, the volume of air inside the flask at 27° C is V.
Now,
V1 = V
T1 = 27°C = 300 K
V2 =?
T2 = 477° C = 750 K
According to Charles’s law,
Therefore, volume of air expelled out = 2.5 V - V = 1.5 V
Hence, fraction of air expelled out
