Home
Class 11
CHEMISTRY
What are the 'DeltaH' sign conventions f...

What are the `'DeltaH'` sign conventions for exothermic and endothermic reactions?

Text Solution

Verified by Experts

Compounds which liberate heat in their formation reaction from the constituent elements are called exothermic compounds.
For this reactions, `triangleH_f ` =negative
Compounds which absorb heat in the formation reaction from the constituent elements are called endothermic compounds.
For this reactions, `triangleH_(F)=` positive.
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise Short Answer Questions|63 Videos

  • THERMODYNAMICS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise Long Answer Questions|4 Videos

  • THERMODYNAMICS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise Important Questions|41 Videos

  • THE S-BLOCK ELEMENTS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise LONG ANSWER QUESTIONS |12 Videos

Similar Questions

Explore conceptually related problems

In exothermic reaction

Not an exothermic reaction

Differentiate exothermic and endothermic reactions.

What are endothermic reactions"?

On increasing temperature, the equilibrium constant of exothermic and endothermic reactions, respectively

What does one mean by exothermic and endothermic reactions? Give examples.

Write the rules for sign convention.

What are the sign conventions of the work done on the system and work done by the system?

VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-THERMODYNAMICS-Very Short Answer Questions
  1. No work is done on the system, but heat (q) is taken out from the syst...

    Text Solution

    |

  2. Work is done by the system and heat (q) is supplied to the system. Wh...

    Text Solution

    |

  3. q=w=-p(ext)(v(f)-v(i)) is for irreversible…. Change.

    Text Solution

    |

  4. q=-w=nRT1n(v(f)-v(i)) is for isothermal ………change.

    Text Solution

    |

  5. What are the 'DeltaH' sign conventions for exothermic and endothermic ...

    Text Solution

    |

  6. What are intensive and extensive properties?

    Text Solution

    |

  7. In the equation q=C.Delta.m.DeltaT, if DeltaT is change in temperature...

    Text Solution

    |

  8. Give the equation that gives the relationship between DeltaU and Delta...

    Text Solution

    |

  9. What is the relationship between C(p) and C(v)?

    Text Solution

    |

  10. 1 g of graphite is burnt in a bomb calorimeter in excess of O(2) at 29...

    Text Solution

    |

  11. For the above reaction what is the internal energy change, DeltaU?

    Text Solution

    |

  12. What is Delta(r)H for CH(4(g))+20(2(g))to CO(2(g))+2H(2)O(l) in terms ...

    Text Solution

    |

  13. Enthalpy decreases is not the criterion for spontaneity. Why?

    Text Solution

    |

  14. Is increase of entropy the criterion for spontaneity ? Why ?

    Text Solution

    |

  15. Explain the relationship between Gibbs energy change and equilibrium c...

    Text Solution

    |

  16. If we measure DeltaH^(theta) and DeltaS^(theta) it is possible to esti...

    Text Solution

    |

  17. Equilibrium constant 'K' is measured accurately in the laboratory at g...

    Text Solution

    |

  18. Comment on the thermodynamics stability of NO((g)) given that 1/2N(2...

    Text Solution

    |

  19. Calculate the entropy change in surroundings when 1.00 mole of H(2)O((...

    Text Solution

    |

  20. The equilibrium constant for a reaction is 10. What will be the value ...

    Text Solution

    |