Home
Class 11
CHEMISTRY
What is the change in entropy when 2.5 m...

What is the change in entropy when 2.5 mole of water is heated from `27^(@)C` to `87^(@)C`? Assume that the heat capacity is constant. `(C_(p,m)(H_(2)O)=4.2J//g-K" and "ln (1.2) = 0.18)`

A

`16.6J//K`

B

`9 J//K`

C

`34.02J//K`

D

`1.89J//K`

Text Solution

Verified by Experts

The correct Answer is:
3
`DeltaS=nC_(p.m)ln.(T_(2))/(T_(1))`
`=2.5xx18xx4.2ln((360)/(300))`
`=34.02J//K`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMIC & THERMOCHEMISTRY

    RESONANCE ENGLISH|Exercise INORGANIC CHEMISTRY(P-Block Elements)|26 Videos

  • STRUCTURAL IDENTIFICATION & PRACTICAL ORGANIC CHEMISTRY

    RESONANCE ENGLISH|Exercise Section -B|18 Videos

Similar Questions

Explore conceptually related problems

What is the change in entropy when 2.5 mole of water is heated from 27^(@)C to 87^(@)C ? Assume that the heat capacity is constant (C_(p))_(m)(H_(2)O)=4.2J//g=k,ln(1.2)=0.18)

What is the change in entropy when 2.5 mole of water is heated from 27^(@)C to 87^(@)C ? Assume that the heat capacity is constant (C_(p))_(m)(H_(2)O)=4.2J//g=k,ln(1.2)=0.18)

Find the change in the internal energy of 2 kg of water as it heated from 0^(0)C to 4^(0)C . The specific heat capacity of water is 4200 J kg^(-1) K^(-1) and its densities at 0^(0)C and 4^(0)C are 999.9 kg m^(-3) and 1000 kg m^(-3) respectively. atmospheric pressure =10^(5) Pa.

Find the change in the internal energy of 2 kg of water as it heated from 0^(0)C to 4^(0)C . The specific heat capacity of water is 4200 J kg^(-1) K^(-1) and its densities at 0^(0)C and 4^(0)C are 999.9 kg m^(-3) and 1000 kg m^(-3) respectively. atmospheric pressure =10^(5) Pa.

Find the change in the internal energy of 2 kg of water as it heated from 0^(0)C to 4^(0)C . The specific heat capacity of water is 4200 J kg^(-1) K^(-1) and its densities at 0^(0)C and 4^(0)C are 999.9 kg m^(-3) and 1000 kg m^(-3) respectively. atmospheric pressure =10^(5) Pa.

Calculate the change in internal energy when 5g of air is heated from 0^(@) to 4^(@)C . The specific heat of air at constant volume is 0.172 cal g^(-1) .^(@)C^(-1) . a) 28.8 J b) 14.4 J c) 7.2 J d) 3.51 J

A sample of 100 g water is slowly heated from 27^(o)C to 87^(o)C . Calculate the change in the entropy of the water. specific heat capacity of water =4200 j/kg k .

A sample of 10g H_(2)O is slowly heated from 27^(@)C to 87^(@)C . Calculate the change in entropy during heating. (specific heat of water =4200 J kg^(-1)K^(-1)) .

When water is heated from 0^(@)C to 4^(@)C and C_(P) and C_(V) are its specific heats at constant pressure and constant volume respectively , then :-

If one mole of monoatomic ideal gas expanded from 2 atm to 0.5 atm at 27°C, then the entropy change will be

RESONANCE ENGLISH-THERMODYNAMIC & THERMOCHEMISTRY-INORGANIC CHEMISTRY(P-Block Elements)
  1. What is the change in entropy when 2.5 mole of water is heated from 27...

    Text Solution

    |

  2. Heat of atomisation of NH3 and N2H4 are x kcal mol^(-1) respectively....

    Text Solution

    |

  3. For the reaction at 25^(@)C, C(2)O(4)(l) rarr 2XO(2)(g) Delta H =2.1...

    Text Solution

    |

  4. If one mole of an ideal gas (C(p,m)=(5)/(2)R) is expanded isothermally...

    Text Solution

    |

  5. P-V plts for the gases ( assuming ideal behaviour and similar conditio...

    Text Solution

    |

  6. An ideal gas at initial pressur eP(1) and volume V(1) undergoes rever...

    Text Solution

    |

  7. When a system is taken from state B to state A along path BDA as shown...

    Text Solution

    |

  8. In a system, a piston caused an external pressure of 1.25 bar giving a...

    Text Solution

    |

  9. If 1 mole of an ideal gas expands isothermally at 37^(@)C from 15 litr...

    Text Solution

    |

  10. Two moles of an ideal gas undergo the following process : (a) a reve...

    Text Solution

    |

  11. What are the signs of the entropy change ( + or -) in the following: ...

    Text Solution

    |

  12. If HA+NaOH rarr NaA+H(2)O" "DeltaH=-12kcal and HB+NaOH rarr NaB+...

    Text Solution

    |

  13. A reaction has DeltaH=-33 kJ and DeltaS=-58 J//K. This reaction would ...

    Text Solution

    |

  14. In the isothermal reversible compression of 52.0m mol of a perfect gas...

    Text Solution

    |

  15. A child bought a balloon which became very small in size the next day....

    Text Solution

    |

  16. It the following processes, identify the irreversible process :

    Text Solution

    |

  17. If bond energy of H(2),F(2) and HF are in the ratio 2:1:3 and DeltaH(a...

    Text Solution

    |

  18. One mole of a non-ideal gas undergoes a change of state from (1.0 atm,...

    Text Solution

    |

  19. Calculate the final pressure of a sample of carbon dioxide that expand...

    Text Solution

    |

  20. The heat evolved from the combustion of carbon is used to heat water. ...

    Text Solution

    |

  21. The equilibrium constant for A(g)+B(2)(g) hArr AB(2)(g)" "k(p)=1...

    Text Solution

    |