Kinetic energy
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Kinetic energy
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16 Questions

1. Two containers engines A and B are operated inseriesThe engine A receives heat from the source attemperature T1 and rejects the heat to the sink attemperature TThe second engine B receives the heat attemperature T and rejects to its sink at temperature T 2.For what value of T the efficiencies of the two enginesare equal? [NEETKar2013]
2. At 10° C the value of the density of a fixed mass ofan ideal gas divided by its pressure is xAt 110°Cthisratio is: [2008]
3. For a certain gas the ratio of specific heats is given tobe γ= 1.5For this gas [1990]
4. The equation of state for 5 g of oxygen at apressure P and temperature T - when occupying avolume V - will be [2004]
5. Two containers A and B are partly filled with waterand closedThe volume of A is twice that of B and itcontains half the amount of water in BIf both are at thesame temperature - the water vapour in the containerswill have pressure in the ratio of [1988]
6. In a vessel - the gas is at a pressure PIf the mass ofall the molecules is halved and their speed is doubled - then the resultant pressure will be [NEETKar2013]
7. One mole of an ideal monoatomic gas requires 207 Jheat to raise the temperature by 10 K when heated atconstant pressureIf the same gas is heated at constantvolume to raise the temperature by the same 10 K - theheat required is [Given the gas constant R= 8.3 J/ mol.K][1990]
8. The degree of freedom of a molecule of a triatomicgas is [1999]
9. According to kinetic theory of gases - at absolute zerotemperature [1990]
10. A polyatomic gas with n degrees of freedom has amean energy per molecule given by [1989]
11. The number of translational degrees of freedom fora diatomic gas is [1993]
12. At 0 K - which of the following properties of a gaswill be zero? [1996]
13. Three containers of the same volume contain threedifferent gasesThe masses of the molecules are m 1 - m2and m 3 and the number of molecules in their respectivecontainers are N 1 - N 2 and N 3. The gas pressure in thecontainers are P1 - P2 and P3 respectivelyAll the gasesare now mixed and put in one of these containersThepressure P of the mixture will be [1991]
14. At constant volume - temperature is increased then[1989]
15. The equation of state - corresponding to 8g of O 2 is[1994]
16. If Cs be the velocity of sound in air and C be ther.m.s velocity - then [1994]

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