Home
Class 11
CHEMISTRY
Calculate the standard enthalpy of react...

Calculate the standard enthalpy of reaction for the following reaction using the listed enthalpies of reaction :
`3Co(s)+2O_(2)(g)rarrCo_(3)O_(4)(s)`
`2 Co(s)+O_(2)(g)rarr2CoO(s)," "DeltaH_(1)^(@)=-475.8 kJ`
`6CoO(s)+O_(2)(g)rarr2Co_(3)O_(4)(s),DeltaH_(2)^(@)=-355.0 kJ`

A

`-891.2 kJ`

B

`-120.8 kJ`

C

`+891.2 kJ`

D

`-830.8 kJ`

Text Solution

Verified by Experts

The correct Answer is:
A
`DeltaH^(@)=(3)/(2)xxDeltaH_(1)^(@)+(DeltaH_(2)^(@))/(2)`
`=-713.7 - 177.5`
`=-891.2 " kJ"`
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

The enthalpy change for the following reaction is 368kJ. Calculate the average O-F bond energy. OF_(2(g)) rarr O_((g)) + 2F_((g))

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 .

In the redox reaction 2S_(2)O_(3)^(2-)+I_(2) rarrS_(4)O_(6)^(2-)+2I^(-)

What is the equilibrium expression for the reaction, P_(4(s)) + 5O_(2(g)) hArr P_(4)O_(10(s)) ? .

When charcoal burns in air signs of DeltaH and DeltaS "are " 2C_((s)) + O_(2(g)) rarr 2CO_((g))

Amongst the chemical reaction given below, the reaction with increasing entropy are H_(2)O(l)rarr H_(2)O(g) C(s)+CO_(2)(g)rarr2CO(g) 2H_(2)(g)+O_(2)(g)rarr2H_(2)O(l) N_(2)(g)+O_(2)(g)rarr " Mixture of "N_(2)and O_(2)

Complete and balance the following reactions : (i) H_(2)(g) + M_(6)O_(3)(s) overset(Delta)(rarr) .

How will an increase in pressure and affect each of the following equilibria? An increase in temperature (i) 2NH_(3)(g)hArrN_(2)(g)+3H_(g)DeltaH=932kJ (ii) N_(2)(g)+O(2)(g)hArr2NO(g)DeltaH=181kJ (iii) 2O_(3)(g)hArr3O_(2)(g)DeltaH=-285kJ (iv) CaO(s)+CO_(2)(g)hArr CaCO_(3)(s)DeltaH=-176kJ

Calcutate Delta H in kJ for the following reaction C(g)+O_(2)(g) Given that , H_(2)O(g)+C_(g)toCO(g)+H_(2)(g),""""" DeltaH=+131kJ CO(g)+(1)/(2)O_(2)(g)toCO_(2)(g) """"'DeltaH=-282kJ H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(g) """""DeltaH=-242kJ

In the reactions given below, identify the species undergoing oxidation and reduction : (i) H_(2)S (g) + Cl_(2) (g) rarr HCl (g) + S (s) (ii) 3Fe_(3)O_(4) (s) + 8 Al (s) rarr 9 Fe(s) + 4Al_(2)O_(3) (s) (iii) 2Na (s) + H_(2) (g) rarr 2 NaH (s)