N2(g) + 2O2 (g) rarr 2NO2 (g) + X kJ 2NO...

`N_2(g) + 2O_2 (g) rarr 2NO_2 (g) + X kJ 2NO (g) + O_2(g) rarr 2NO_2 (g) + Y kJ `the enthalpy of.formation of NO is

`(2X-2Y)`

`X-Y`

`1/2(Y-X)`

`1/2(X-Y)`

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K_1 and K_2 are the respective equilibrium constants for the following two reactions : (i) N_2 (g) + O_2 (g) iff 2NO(g) (ii) 2NO(g) + O_2(g) iff 2NO_2(g) Then the equilibrium constant for the reaction N_2 (g) + 2O_2(g) iff 2NO_2(g) will be

Given that H_2O(l) rarr H^+ (aq) + OH^- (aq), DeltaH = 57.32 kJ H_2 (g) + 1/2 O_2(g) rarr H_2O(l) , DeltaH = -286.02 kJ Then calculate the enthalpy of formation of OH^- at 25^@C .

N_2(g)+3H_2(g)rarr 2NH_3(g) Delta H_r^@=-92.4 KJ What is the standard enthalpy of formation of NH_3 ?

For the two equations given below : H_2(g) + 1/2 O_2(g) to H_2O(l) + x_1 kJ H_2(g) +1/2 O_2 (g) to H_2O(g) + x_2 kJ Select the correct answer(s)

For the equilibrium N_2 (g) + O_2(g) = 2 NO (g)

Consider that the first order decomposition reaction of N_2O_5 written as 2N_2O_5(g) rarr 4NO_2(g) + O_2(g): rate = k[N_2O_5] N_2o_5(g) rarr 2NO_2(g) +1/2 O_2(g): rate = k^'[N_2O_5] Which among the following one is correct?

Calculate the standard enthalpy of reaction at 25^@C temperature for the following reaction : C_6H_6(I) + frac 15/2 O_2 (g) rarr 6CO_2(g)+3H_2O(I) . Given: The standard enthalpy of formation of C_6H_6(I) , .CO_2(g) and H_2O(I) are 49.0kJ mol^-1 , -393.5 kJ mol^-1 and -285.8 kJ mol^-1 respectively.

Given : N_2(g) + 3H_2(g) iff 2NH_3(g), K_1 N_2(g) + O_2(g) iff 2NO(g), K_2 H_2(g) + 1/2 O_2(g) iff H_2O(g), K_3 The equilibrium constant for, 2NH_3(g) + 5/2 O_2(g) iff 2NO(g) + 3H_2O(g) will be :

The heat of reaction for the following reaction (DeltaH^(0)) at 25^(@)C temperatue is -1368 kJ: C_(2)H_(5)OH(l)+3O_(2)(g) to 2CO_(2)(g)+3H_(2)O(l) If the enthalpy of formation of CO_(2)(g) and H_(2)O(l) at 25^(@)C are -393.5 and -285.8 kJ*mol^(-1) respectively, then what will be the value of the standard enthalpy of formation of C_(2)H_(5)OH(l) ?

UNITED BOOK HOUSE-MODEL QUESTION PAPER 3-EXERCISE

The value of gas cosntant R is 8.314 X. Here X represents
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