Home
Class 12
CHEMISTRY
Enthalpy of reaction DeltaH is expressed...

Enthalpy of reaction `DeltaH` is expressed as

A

`DeltaH=sumH_(P)-sumH_(R )`

B

`DeltaH=dH_(P)+dH_(R )`

C

`DeltaH=(dH_(P))/(dH_(R ))`

D

`DeltaH=(sumH_(P))/(sumH_(R ))`

Text Solution

Verified by Experts

The correct Answer is:
A
`DeltaH=["Sum of enthalpy of formation of products"]-["Sum of enthalpy of formation of reactants"]`
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    DINESH PUBLICATION|Exercise Additional Numerical Problems For Practice|16 Videos

  • CHEMISTRY IN EVERY DAY LIFE

    DINESH PUBLICATION|Exercise Unit test-9|50 Videos

Similar Questions

Explore conceptually related problems

For an endothermic reaction, energy of activation is E_a and enthalpy of reaction is DeltaH (both of these in kJ/mol). Minimum value of E will be

Heat of reaction (DeltaH) is given by

For a reaction, C_((s))+O_(2(g))rarrCO_(2(g)) What is the relation between enthalpy of reaction (DeltaH_(r)), enthalpy of formation of CO_(2)(DeltaH_(f)) and enthalpy of combustion of carbon (DeltaH_("comb")) ?

For the conversion of 1 mole of SO_(2)(g) into SO_(3)(g) the enthalpy of reaction at constant volume. DeltaU , at 298 K is -97.027kJ . Calculate the enthalpy of reaction, DeltaH , at constant pressure.

In a reaction P+Q rarr R+S , there is no change in entropy, Enthalpy change for the reaction (DeltaH) is "12 kJ mol"^(-1) . Under what conditions, reaction will have negative value of free energy change?

Choose the correct order of enthalpy of formation, DeltaH_(f)^(@) for halides of alkali metals :

Choose the reaction, for which the standard enthalpy of reaction is equal to the standard enthalpy of formation:

If DeltaH_(f)(X) , DeltaH_(f)(Y) , DeltaH_(f)(R ) and DeltaH_(f)(S) denote the enthalpies of formation of X , Y , R and S respectively, the enthalpy of the reaction X+YtoR+S is given by

DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. Which relation is correct ?

    Text Solution

    |

  2. Variation of heat of reaction with temperature is known as

    Text Solution

    |

  3. Enthalpy of reaction DeltaH is expressed as

    Text Solution

    |

  4. Heat capacity is

    Text Solution

    |

  5. Given that C+O(2)rarrCO(2),DeltaH^(@)=-xKJ and 2CO+O(2)rarr2CO(2),Delt...

    Text Solution

    |

  6. The enthalpy change of a reaction does not depend on

    Text Solution

    |

  7. Given : S((s))+(3)/(2)O(2(g))rarrSO(3(g)+2X Kcal SO(2(s))+(1)/(2)O(2...

    Text Solution

    |

  8. NH(3)(g)+3Cl(2)toNCl(3)(g)+3HCl(g),DeltaH(1) N(2)(g)+3H(2)(g)to2NH(3...

    Text Solution

    |

  9. When enthalpy and entropy change for a chemical reaction are -2.5 xx10...

    Text Solution

    |

  10. The bond dissociation energy of gaseous H(2),Cl(2) and HCl are 104,58 ...

    Text Solution

    |

  11. At constant TandP,Which of the following statements is correct for the...

    Text Solution

    |

  12. A reaction is not feasible if

    Text Solution

    |

  13. One mole of an ideal gas at 300K is expanded isothermally from an init...

    Text Solution

    |

  14. Identify the correct statement regarding entropy

    Text Solution

    |

  15. The reaction is sontaneous if the cell potential is

    Text Solution

    |

  16. In an endothermic reaction, the value of DeltaH is

    Text Solution

    |

  17. Enthalpy of an exothermic reaction is always

    Text Solution

    |

  18. DeltaH for solid to liquid transitions for protein A and B are 2.73 kc...

    Text Solution

    |

  19. The heat absored at constant volume is equal to the system's change in

    Text Solution

    |

  20. Which of the following holds good to the laws of thermodynamics for th...

    Text Solution

    |