Home
Class 11
CHEMISTRY
An imaginary reaction X rarr Y takes pla...

An imaginary reaction `X rarr Y` takes place in three steps
`X rarr A, DeltaH=-q_(1), " "BrarrA, DeltaH=-q_(2), " "BrarrY, DeltaH=-q_(3)`
If Hess's law is applicable, then the heat of the reaction `(X rarr Y)` is :

A

`q_(1)-q_(2)+q_(3)`

B

`q_(2)-q_(3)-q_(1)`

C

`q_(1)-q_(2)-q_(3)`

D

`q_(3)-q_(2)-q_(1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`XrarrA+q_(1)`
`q_(2)+ArarrB`
`BrarrY+q_(3)`
`q_(2)+XrarrY+q_(1)+q_(3), " "DeltaH=q_(2)-q_(1)-q_(3)`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    NARENDRA AWASTHI|Exercise Level 1 (Q.1 To Q.30)|6 Videos

  • THERMODYNAMICS

    NARENDRA AWASTHI|Exercise Level 1 (Q.31 To Q.60)|2 Videos

  • STOICHIOMETRY

    NARENDRA AWASTHI|Exercise Level 3 - Subjective Problems|20 Videos

Similar Questions

Explore conceptually related problems

A hypothetical reaction, A rarr 2B , proceeds via following sequence of steps {:(ArarrC,,DeltaH = q_(1),,,),(CrarrD,,DeltaH = q_(2),,,),((1)/(2)D rarrB,,DeltaH = q_(3),,,):} The heat of reaction is

For the reaction, C+O_(2)rarrCO_(2) , DeltaH=-393 J 2Zn+O_(2) rarr 2ZnO , DeltaH=-412J

Dissociation of water takes place in two steps : H_(2)OrarrH+OH," "DeltaH=+497.8kJ OH rarr H+O," "DeltaH=428.5kJ Water is the bond energy of O-H bond ?

A hypothetical reaction Ato2B , proceeds through following sequence of steps (i) A to C,DeltaH=q (ii) C to D,DeltaH=v (iii) (1)/(2)D to B,DeltaH=x Then, the heat of reaction is

H_(2)(g)+I_(2) (s) rarr 2HI (g), DeltaH=51.9 KJ/mole H_(2)(g)+I_(2)(g) rarr 2 HI (g), DeltaH=-9.2 kJ/mole. the heat of reaction of I_(2)(s) rarr I_(2) (g)

For the reaction 2Cl(g) rarr Cl_(2)(g) , what are the signs of DeltaH and DeltaS ?

Given that , A(s) rarr A(l)DeltaH=x A(l) rarr A(g), DeltaH=y The heat of sublimation of A will be :

Consider the following two reactions: i. Propene +H_(2) rarr Propane, DeltaH_(1) ii. Cyclopropane +H_(2) rarr Propane, DeltaH_(2) Then, DeltaH_(2) - DeltaH_(1) will be: