Home
Class 11
CHEMISTRY
Four grams of helium gas is expanded fro...

Four grams of helium gas is expanded from 1 atm to one tenth of its original pressure at `30^@`change in entropy assuming ideal gas behaviour is:

A

`38.3JK^(-1)`

B

`76.6JK^(-1)`

C

`19.15JK^(-1)`

D

`100JK^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • STATES OF MATTER (GASES & LIQUIDS)

    PATHFINDER|Exercise QUESTION BANK|280 Videos

Similar Questions

Explore conceptually related problems

2 mol of an ideal gas at 3 atm pressure is expanded from 10 lit to 20 lit. Find work done and change in internal energy.

A gas can expand from 100 mL to 250 mL. under a constant pressure of 2 atm. The work done by the gas is

What amount of work is done if an ideal gas expands from 10 L of 20 L at 2 atm pressure?

Pressure of 1 mol of an ideal gas confined in a cylinder fitted with a piston is 50 atm. The gas is expanded reversible when the cylinder is kept in contact to a thermostat at 25^(@)C . During expansion, the pressure of the gas is decreased from 50 to 5 atm. calculate the change in entropy in this process. if the heat absorbed by the gas during expansion be 5705J, then calculate the change in entropy of the surroundings ?

If one monoatomic gas is expanded adiabatically from 2L to 10L at 1 atm external pressure then the value of DeltaU (in atm*L ) is-

(i) 1 mol of an ideal gas expands isothermally and reversible from (P_(1)V_(1)T) to (P_(2)V_(2)T) . Write down the equation showinig the amount of heat absorbed by the given ideal gas. (ii) In an isothermal expansion of an ideal gas, the pressure of the gas decreases from P_(1) to P_(2) . write down the equation of work done by the gas in this process. (iii) The temperature of 1 mol of an ideal gas is increased from T_(1) and T_(2) . write down the equations for the changes in enthalpy and internal energy.

To an evacuated vessel with movable piston under external pressure of 1 atm, 0.1 mole of He and 1.0 mole of an unknown compound (vapour pressure 0.68 atm at 0°C) are introduced. Considering the ideal gas behaviour, the total volume (in litre) of the gases at 0°C is close to

1 mol of an ideal gas is expanded from its initial volume of 1 L to the final volume of 100 L at 25^(@)C . What will be the change in enthalpy for this process?

Two litre of N_2 at 0^@C and 5 atm pressure are expanded isothermally against a constant external pressure of 1 atm until the pressure of gas reaches 1 atm. Assuming gas to be ideai, calculate work of expansion.

An ideal gas is expanded from 1L to 6L in a closed vessel at 2 atm pressure by applying heat at fixed temperature. Calculate work done and heat absorbed by the gas. [Given: 1 L atm=24.22 cal]

PATHFINDER-THERMODYNAMICS-QUESTION BANK
  1. For the following reaction occuring in an automobile 2C8H18(g)+25O2(g)...

    Text Solution

    |

  2. The energy for molecular motion appears in the form of

    Text Solution

    |

  3. Four grams of helium gas is expanded from 1 atm to one tenth of its or...

    Text Solution

    |

  4. The enthalpy of neutralisation of HCl by NaOH is -57.1 KJ and that of ...

    Text Solution

    |

  5. Whenever an acid is neutralised by a base the net reaction is H^(+)(aq...

    Text Solution

    |

  6. The bond dissociation energies of two O-H bond in water are: H2O(g)rar...

    Text Solution

    |

  7. System performed pressure volume work when in between system and surro...

    Text Solution

    |

  8. Change in internal energy of a system is

    Text Solution

    |

  9. Which of the following statement is correct?

    Text Solution

    |

  10. For endothermic reaction which is correct?

    Text Solution

    |

  11. Which of the following element standard enthalpy is not to be equal to...

    Text Solution

    |

  12. When the bond of CH4(g) is dissociated then

    Text Solution

    |

  13. When a liquid substance is converted to solid substance its entropy

    Text Solution

    |

  14. When ozone is converted to oxygen then entropy

    Text Solution

    |

  15. A reaction occurs spontaneously if

    Text Solution

    |

  16. Assume the reaction is carried out in an open system for which reactio...

    Text Solution

    |

  17. Which of the following reaction does not define standard enthalpy of f...

    Text Solution

    |

  18. Which of the following is correct ?

    Text Solution

    |

  19. Write true or false of the following statements: Molar mass is an ext...

    Text Solution

    |

  20. Write true or false of the following statements: Degree of randomness...

    Text Solution

    |