Question

A school has four storeyed building. Some students have their classes on 3rd and 4th floor of the building. Many students go by the staircase whereas some go by elevator. It is observed that students are going by steps feel fresh throughout the day as compared to those who go by the elevator.

i) What will be the work done by 3 moles of an ideal gas when it expands spontaneously in a vacuum?
(a) zero
(b) infinite
(c) 3 joules
(d) 9 joules

ii) Comment on the thermodynamic nature of the work done by the students, one gone by the staircase and other by elevator on the same floor.

iii) Students going by the staircase should feel tired? Instead, why does he/she feel fresh throughout the day?

iv) Which law applies here and how?

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Answer 1

Answer:

students get oxygen by respiration