Home
Class 11
CHEMISTRY
Given the following equations and DeltaH...

Given the following equations and `DeltaH^(@)` values, determine the enthalpy of reaction at 298 K for the reaction :
`C_(2)H_(4)(g)+6F_(2)(g) to 2HF_(4)(g)+4HF(g)`
`H_(2)(g)+F_(2)(g)to2HF(g)+2HF(g)," "DeltaH_(1)^(@)=-537" kJ"`
`C(s)+2F_(2)(g)toCF_(4)(g)," "DeltaH_(2)^(@)=-680" kJ"`
`2C(s)+2H_(2)(g)toC_(2)H_(4)(g)," "DeltaH_(3)^(@)=52" kJ"`

A

`-1165`

B

`-2486`

C

`+1165`

D

`+2486`

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaH^(@)=2xxDeltaH_(1)^(@)+2xxDeltaH_(2)^(@)-DeltaH_(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

Give that C_(s) +O_(2_(g))to CO_(2_((g))), Delta H^(0)=-xkJ 2CO_((g))+O_(2_((g)))to 2CO_(2_((g))), Delta H^(0)=-ykJ .

Calculate H^(@) for the reaction , Na_(2)O(s)+SO_(3)(g)toNa(2)SO_(4)(g) (A) Na(s)+H_(2)O(l)toNaOh(s)+(1)/(2)H_(2)(g) DeltaH^@)=-146kJ (B) Na_(2)SO_(4)(s)+(H)_(2)O(l)to2Na(s)+SO_(3)(g) DeltaH^(@)=+418kJ (C) 2Na_(2)O(s)+2H_(2)(g))to4Na(s)+2H_(2)O(l) DeltaH^(@)=+259kJ

Which of the following holds good to the laws of thermodynamics for the reaction ? C_2H_(4(g)) + 3O_(2(g)) to 2CO_(2(g)) + 2H_2O_((l))

The enthalpy of the reaction H _(2 (g)) + 1/2 O _(2(g)) to H _(2) O _((g)) is Delta H _(1) and that of H _(2(g)) + 1/2 O _(2(g)) to H _(2) O _((l)) is Delta H _(2). Then

The enthalpy change for the reaction C_(2)H_(6(g)) rarr 2C_((g)) + 6H_((g)) is x kJ. The bond energy of C-H bond is:

Write reaction equotient, Q, for each of the following reactions. a. 3O_(2)(g)hArr2O_(3)(g) b. 4NH_(3)(g)+7O_(2)(g)hArr 4NO_(2)(g)+6H_(2)O(g)