Home
Class 12
CHEMISTRY
In an endothermic reaction, the value of...

In an endothermic reaction, the value of `DeltaH` is

A

(A) zero

B

(B) positive

C

(C) negative

D

(D) constant

Text Solution

Verified by Experts

The correct Answer is:
B
For endothermic reactions standard heat of reaction `(DeltaH)` is positive because in these reactions total energy of reactants is lower than that of products , i.e., `E_(R) lt E_(P)`
So, `DeltaH=E_(P)-E_(R)=+ve`
Doubtnut Promotions Banner Mobile Dark
|

Similar Questions

Explore conceptually related problems

In an endothermic reaction, the total enthalpy of products is greater than that of reactants.

For an endothermic reaction, where Delta H represents the enthalpy of reaction in kJ mol^(-1) , the minimum value for the energy of activation will be

Knowledge Check

  • In endothermic reactions,

    A
    reactants have more energy than products
    B
    reactants have less energy than products
    C
    reactants and products have same energy
    D
    reactants have lower temperature than products.

  • Decrease in free energy of a reacting system indicates: an exothermic reaction an endothermic reaction a spontaneous reaction a slow reaction.

    A
    an exothermic reaction
    B
    an endothermic reaction
    C
    a spontaneous reaction
    D
    a slow reaction.

    • Similar Questions

    Explore conceptually related problems

    What do you undestand by exothermic reaction and endothermic reaction? Give one example of each type.

    For an endothermic reaction energy of activation is E_(a) and enthlpy of reaction is Delta H (both in kJ "mol"^(-1) ). Minimum value of E_(a) will be

    For an endothermic reaction to be spontaneous

    In an endothermic reaction energy absorbed is more than the energy released.

    For a hypothetical reaction nX to mY , the value of DeltaH =-133 kJ and DeltaS = -145 J K^(-1) . Calcualte value of DeltaS_("surr".) and DeltaS_("univ")

    For a hypothetical reaction nX to mY , the value of DeltaH =-133 kJ and DeltaS = -145 J K^(-1) . Calcualte the value of DeltaG at 700 K.

    Home
    Profile