The temperature of an open room of volume 30 m 3 increases from 17 ° C to 27 ° C due to the sunshine. The atmospheric pressure in the room remains 1 × 10 5 Pa . If n i and n f are the number of molecu

Question

The temperature of an open room of volume 30 m 3 increases from 17 ° C to 27 ° C due to the sunshine. The atmospheric pressure in the room remains 1 × 10 5 Pa . If n i and n f are the number of molecules in the room before and after heating, then n f - n i will be:

TestHub · Accepted Answer

T i = 273 + 17 = 290 K T f = 273 + 27 = 300 K From ideal gas equation, P V = n R T ⇒ n = P V R T n f - n i = P V R 1 T f - 1 T i = - 2.5 × 10 25

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