Question: A bubble has surface tension S. The ideal gas inside the bubble has ratio of specific heats y 3 bubble is exposed to the

A bubble has surface tension S. The ideal gas inside the bubble

has ratio of specific heats y 3 bubble is exposed to the

A bubble has surface tension S. The ideal gas inside the bubble has ratio of specific heats y 3 bubble is exposed to the atmosphere and it always retains its spherical shape. When the atmospheric pressure is Pai, the radius of the bubble is found to be r and the temperature of the enclosed gas is T. When the atmospheric pressure is Pa2, the radius of the bubble and the temperature of the enclosed gas are r2 and T, respectively. Which of the following statement(s) is(are) correct? (A) If the surface of the bubble is a perfect heat insulator, then negligible, then 4 O 12 12 2S P+ al " (B) If the surface of the bubble is a perfect heat insulator, then the total internal energy of the bubble including its surface energy does not change with the external atmospheric pressure. (C) If the surface of the bubble is a perfect heat conductor and the change in atmospheric temperature is 45 P+ a2 Pal+ A 41 12 12 4S r Pa + a2 = 2S The T (D) If the surface of the bubble is a perfect heat insulator, then T = P+ a2 Pal+ 4S 1/ 4S 1

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