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A sample of gas is compressed from an in...

A sample of gas is compressed from an initial volume of `2v_(0) " to " v_(0)` using three different processes.
First: Using reversible isothermal
Second: Using reversible adiabatic
Third: Using irreversible adiabatic under a constant external pressure then

A

Final temperature of gas will be highest at the end of third process.

B

Final temperature of gas will be highest at the end of second process

C

Enthalpy change of sample will be highest in isothermal process

D

Final pressure of gas will be highest at the end of second process.

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A
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When a gas is compressed to half of its initial volume. If it is comparision between isothermal and adiabatic process, then a) Work done is less if the change is Isothermal b) Final pressure is more if the change is adiabatic c) Final pressure is less if the change is Isothermal

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Starting with the same initial conditions an ideal gas expands from volume V_(1)" to "V_(2) in three different ways. The work done by the gas is W_(1) if the process is purely isothermal, W_(2) if purely isobaric and W_(3) if purely adiabatic. then

If the boundary of system moves by an infinitiesimal amount, the work involved is given by dw= -P_("ext") dV, for irreversible process W= -P_("ext") Delta V (where DeltaV= V_(f)- V_(i) ). For reversible process P_("ext") = P_("int") +- dP ~~ P_("int") , so for reversible isothermal process W= -nRT ln (V_(f))/(V_(i)) . 2 mole of an ideal gas undergoes isothermal compression along three different paths: (i) reversible compression from P_(i)= 2 bar and V_(i)= 8 to P_(f)=20 bar (ii) a single stage compression against a constant external pressure of 20 bar (iii) a two stage compression consisting initially of compression against a constant external pressure of 10 bar until P_("gas") = P_("ext") , followed by compression against a constant pressure of 20 bar until P_("gas") = P_("ext") . Total work done on the gas in two stage compression is

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AAKASH SERIES-CHEMICAL THERMODYNAMICS-Practice Sheet-Exercise-I
  1. One mole of an ideal monoatomic gas expands isothermally against const...

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  2. The magnitudes of enthalpy changes for irreversible adiabatic expansio...

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  3. A sample of gas is compressed from an initial volume of 2v(0) " to " v...

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  4. One mole of an ideal monoatomic gas at temperature T and volume 1L exp...

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  5. Which has maximum internal energy at 298K?

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  6. A heat engine absorbs heat q(1) from a source at temperature T(1) and ...

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  7. Assertion: An isothermal process is always an isolated one. Reason: ...

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  8. What is DU for the process described by figure. Heat supplied during t...

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  9. 6 what is the change in internal energy when a gas contracts from 377 ...

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  10. The heat capacity of liquid water is 75.6 J/mol K, while the enthalpy ...

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  11. Statement -I : There is no change in enthalpy of an ideal gas during c...

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  12. Molar heat capacity of water in equilibrium with ice at constant press...

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  13. Which of the following statements is false?

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  14. On which of the following factors does internal energy depend upon

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  15. The enthalpy is maximum for

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  16. The different between DeltaH and DeltaE for the reaction BaCl(2(aq)) ...

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  17. For the gaseous reaction involving the complete combustion of isobutan...

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  18. During a process work equivalent to 400J is done on a system, which gi...

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  19. A system absorbs 10kJ of heat at constant volume and its temperature r...

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  20. Which of the following come under the view of thermodynamics?

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