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A gas expands in an insulated container ...

A gas expands in an insulated container against a constant external pressure of 1.5 atm from an initial volume of 1.2 L to 4.2 L. The change in internal energy (`DeltaU`) of gas is nearly (1 L-atm = 101.3 J)

A

-456J

B

+456J

C

-402J

D

+402J

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AAKASH INSTITUTE ENGLISH-TEST 3-EXERCISE
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  2. If the enthalpies of formation of C3H8(g), CO2(g) and H2O(l) at standa...

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  3. When 5 moles of an ideal gas is expended at 350 K reversibly from 5 L ...

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  4. When 1.5 mol of a gas is heated at constant volume from 300 K to 350 K...

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  5. For which of the following reactions, deltaH = deltaU?

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  6. Select the state functions among the following. (i) U + PV (i...

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  7. The bond energies of H - H and I - I bonds are 435 kJ mol^-1 and 150 k...

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  8. The ratio of everage speed, most probable speed and root mean square s...

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  9. If the energy absorbed by each X2 molecule of a gas is 3.5xx10^-19 J a...

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  10. Ratio of everage kinetic energy of 14 g of N2 at 27^oC to 24 g of O2 a...

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  11. In vander waals gas equation, the term that accounts for the volume oc...

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  12. The root mean square speed at NTP for the gases CH4,H2,He and F2 are i...

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  13. At 127^oC, heat of fusion of a compound is 4.8kJ/mol. Entropy change f...

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  14. A gas expands in an insulated container against a constant external pr...

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  15. The enthalpy and entropy change for the reaction, Br2(I) + CI2(g) righ...

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  16. Heat of combustion of carbon monoxide is -283.5 kJ/mole. The heat rele...

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  17. Ratio of the average speed of He and SO2 at 27^o C will be

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  18. The gas which will be most easily liquefied is

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  19. For effusion of equal volume, a gas takes twice the time as taken by m...

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  20. The density of O2 gas at 127^o C and 4.0 atm pressure is (R = 0.082 L ...

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