SATHEE: Thermodynamics Question 3

Thermodynamics Question 3

Question: The pressure in the tyre of a car is four times the atmospheric pressure at 300 K. If this tyre suddenly bursts, its new temperature will be $(γ = 1.4)$

[RPMT 1996; MP PMT 1990]

Options:

A) $Δ U = 0$

B) $Δ U =$ negative

C) $Δ U =$ positive

D) $Δ W =$ zero

Show Answer

Answer:

Correct Answer: B

Solution:

In case of adiabatic expansion $Δ W$ = positive

and $Δ Q = 0$ from FLOT $Δ Q = Δ U + Δ W$

Therefore $Δ U = - Δ W$ i.e., $Δ U$ will be negative.

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Thermodynamics Question 3

Question: The pressure in the tyre of a car is four times the atmospheric pressure at 300 K. If this tyre suddenly bursts, its new temperature will be (γ=1.4)

Options:

Answer:

Solution:

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Question: The pressure in the tyre of a car is four times the atmospheric pressure at 300 K. If this tyre suddenly bursts, its new temperature will be $(γ = 1.4)$