A mass of gas exerts a pressure of `72 cm` of Hg at `27^(@)C`. It is heated at constant volume so that its pressure after some time is `90 cm` of Hg. Calculate the new temperature of the gas.
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When 1 mole gas is heated at constant volume, temperature is raised from 298 to 308 K. Heat supplied to the gas in 500 J. Then, which statement is cor
Correct Answer - B We know that , `DeltaH=DeltaE+pDeltaV` When, `DeltaV=0` `therefore DeltaH=DeltaE` In given problem `DeltaH=500 J ` `-W=-pDeltaV,DeltaV=0` So, `DeltaE=q=500 J`
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The specific heat at constant volume for a gas is 0.075 cal/g and at constant pressure it is 0.125 cal/g. Calculate, (i) the molecular weight of gas,
(i) `C_(P)-C_(V)=(R)/(M)` where, M=molecular of gas `0.125-0.075=(1.987)/(M)` `M=39.74~~40` (ii) `(C_(P))/(C_(V))=gamma` `therefore=(0.125)/(0.075)=1.66` `therefore` 1.66 value of `gamma` shows that the gas is monoatomic.
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When an ideal gas is heated at constant pressure, the fraction of the heat energy supplied whicn increases the internal energy of the gas is :
Correct Answer - D `{:(dQ=dW+dU,,,,),(dQ=PdV+dU,,,,),(dQ=nRdT+dU,,,,):}` `dQ=(2dU)/(f)+dU" "[dU=(nfRdT)/(2)]` `(dU)/(dQ)=(1)/(((2)/(f)+1))` `(dU)/(dQ)=(5)/(7)`
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When two mole of an ideal gas `(C_(p.m) = (5)/(2)R)` heated from `300 K` to `600 K` at constant pressure. The change in entropy of gas `(DeltaS)` is:
Correct Answer - C `DeltaS = nC_(p.m) "In" (T_(2))/(T_(1)) = 2 xx (5)/(2)"R In" (600)/(300) = 5"R In 2`
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A gas at a pressure of 5 atm is heated from `0^(@)C` to `546^(@)C` and simultaneously compressed to one third of its original volume. Hence final pres
`(PV)/(T)=` constant `(5xxV)/(273)=(ptxx(V)/(3))/(819)` `rArrP_(r)=45atm`
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A Perfect gas is enclosed in a vertical cylinder filled with a piston of mass m. The gas is heated by passing constant current I through a heating coi
Correct Answer - `(i^(2)R)/(mg)`
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At constant temperature the pressure of 22.4 dm^3 volume of an ideal gas was increased from 10^5 kPa to 210 kPa, New volume could be -
Option : b. 11.2 dm3
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When a gas is heated the particles move more quickly. What is the change in volume of a heated gas if the pressure is kept constant ?
The volume of the gas increases on heating if pressure is kept constant.
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The volume (V) of a mass of gas varies directly as its absolute temperature (T) and inversely as the pressure (P) applied to it. The gas occupies a vo
Correct Answer - ` (700)/3 K`
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The volume (V) of a mass of gas varies directly as its absulute temperature (T) and iversely as the pressure (P) applied to it. The gas occupies a vol
Correct Answer - 125 K
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