Home
Class 11
CHEMISTRY
Hess's law states that...

Hess's law states that

A

The standard enthalpy of an overall reaction is the sum of the enthalpy changes in individual reactions

B

enthalpy of formation of a compound is same as the enthalpy of decomposition of the compound into constituent elements, but with opposite sign

C

at constant temperature the pressure of a gas is inversely proportional to its volume

D

the mass of a gas dissolved per lit of a solvent is proportional to the pressure of the gas in equilibrium with the solution

Text Solution

Verified by Experts

The correct Answer is:
A
Definitions of Hess law
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL THERMODYNAMICS

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE- II) (LEVEL- II (ADVANCED) STRAIGHT OBJECTIVE TYPE QUESTIONS)|4 Videos

  • CHEMICAL THERMODYNAMICS

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE- II) (LEVEL- II (ADVANCED) MORE THAN ONCE CORRECT ANSWER TYPE QUESTIONS)|6 Videos

  • CHEMICAL THERMODYNAMICS

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE- I) (LEVEL- II (ADVANCED) INTEGER TYPE QUESTIONS)|5 Videos

  • CHEMICAL THERMODYANMICS

    AAKASH SERIES|Exercise Questions For Descriptive Answers|28 Videos

  • ELECTRON MIGRATION EFFECTS

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|10 Videos

Similar Questions

Explore conceptually related problems

Hooke's law states that

For a dilute solution, Raoult's law states that:

State and explain the Hess's law of constant heat summation.

Hess.s law is based on

State and explain Hess law. Write its important applications

The first law of thermodynamics states that

AAKASH SERIES-CHEMICAL THERMODYNAMICS-PRACTICE SHEET (EXERCISE- II) (LEVEL- I (MAIN) STRAIGHT OBJECTIVE TYPE QUESTIONS)
  1. What is theheat of formation of C(6)H(6), given that the heats of comb...

    Text Solution

    |

  2. Heat of combustion of C(2)H(4) is -337 kCal. If 5.6 lit O(2) is used a...

    Text Solution

    |

  3. For the following reaction H((aq))^(+) + OH((aq))^(-) rarr H(2)O((l)) ...

    Text Solution

    |

  4. For the reaction 2H(2)O((l)) rarr H(3)O((aq))^(+) + OH((aq))^(-), the ...

    Text Solution

    |

  5. The heat of neutralisation is maximum when

    Text Solution

    |

  6. Assertion (A): Heat of neutralization of HClO(4) with NaOH is same as ...

    Text Solution

    |

  7. In which of the following combinatins of HCL and NaOH, the heat energy...

    Text Solution

    |

  8. The correct match is

    Text Solution

    |

  9. Heat of neutralisation for the reaction NaOH + HCl rarr NaCl + H(2)O "...

    Text Solution

    |

  10. Under the same conditions how many mL of 1M KOH and 0.5M H(2)SO(4) sol...

    Text Solution

    |

  11. Given that the data for neutralization of a weak acid (HA) and strong ...

    Text Solution

    |

  12. The standard heat of formation of sodium ions in aqueous solution from...

    Text Solution

    |

  13. Heat released in neutralisation of 1 mole of HF with excess NaoH is

    Text Solution

    |

  14. Hess's law states that

    Text Solution

    |

  15. Given C+ 2S rarr CS(2), DeltaHf^(0) = +117.0 KJ mol^(-1), C + O(2) rar...

    Text Solution

    |

  16. NaOH((aq)) + HCl((aq)) rarr NaCl((aq)) + H(2)O, Delta H= -13.6 Kcal. H...

    Text Solution

    |

  17. N(2(g)) + 2O(2(g)) rarr 2NO(2) + xkJ, 2NO((g)) + O(2(g)) rarr 2NO(2(g)...

    Text Solution

    |

  18. (1)/(2) H(2(g)) + (1)/(2) Cl(2(g)) rarr HCl((g)) , Delta H^(0) = - 92....

    Text Solution

    |

  19. The heat of atomisation of PH(3(g)) is 228 kCal mol^(-1) and that of P...

    Text Solution

    |

  20. The enthalpy change for the following reaction is 368kJ. Calculate the...

    Text Solution

    |