Comment on the thermodynamic stability of NO(g) and `NO_2(g)` given :
`frac{1}{2}N_2(g)+frac{1}{2}O_2(g)rightarrowNO(g) , Delta_fH^o=90 kJ mol^-1`
`NO(g)+frac{1}{2}O_2(g)rightarrowNO_2(g) , Delta_fH^o=-74 kJ mol^-1`

a) Find the enthalpy of the reaction, C(graphite) + O_2(g)rightarrowCO_2(g) Given, i) C(graphite) +frac{1}{2}O_2(g)rightarrowCO(g),DeltaH=-110.5kJmol^-1 ii) CO(g) +frac{1}{2}O_2(g)rightarrowCO_2(g),DeltaH=-283.0kJmol^-1 b) Melting of ice is a spontaneousnprocess. What are the criteria for spontaneity of a process?

The enthalpy change in a process is the same, whether the process is carried out in a single step or inseveral steps. a) Identify tha law stated here. b) Calculate the enthalpy of formation of CH_4 from the following data : i) C_((s))+O_(2(g))rightarrowCO_(2(g)) DeltaH = -393.7kJ/mol ii) H_(2(g))+frac{1}{2}O_(2(g))rightarrowH_2O_((l)) DeltaH = -285.8kJ/mol iii) CH_(4(g))+2O_(2(g))rightarrowCO_(2(g)) DeltaH =-890.4kJ/mol

Calcutae the enthalpy of the reaction CO(g)+1/2O_2(g)rarrCO_2(g) from the following data C(s)+O_2(g)rarrCO_2(g) , Delta_rH^0=-394.7kJ ---------(1) C(s)+1/2O_2(g)rarrCO(g) , Delta_rH^0=-110.5kJ ---------(2)

Calculate the enthalpy of formation of CH_4 from the following data: C_(s) + O_(2(g)) rarr CO_2(g) DeltaH = -393.5 kJ//mol 2H_(2(g) + O_(2(g)) rarr 2H_2O_(l) DeltaH = -571.8 kJ//mol CH_4(g)+ 2O_(2(g)) rarr CO_2(g) +2H_2O_(l) DeltaH = -890.3 kJ//mol

Consider the following reaction at 1000^circ C (A). Zn_((s)) + 1 / 2 O_2 (g) rarr ZnO_ ((s)) , Delta G^circ=-360 kJmol^-1 (B). C_((grap))+1 / 2 O_2 (g) rarr CO_ ((g)) , Delta G^circ=-460 k Jmol^-1 choose the correct statement at 1000^circ C . : Zinc can be oxidised by carbon monoxide, zinc oxide can be reduced by graphite, both (a) and (b) are flase, both (a ) and (b) are true

The equations representing the combustion of carbon and carbon monoxide are: 'C(s)+O_2(g) rarr CO_2(g) Delta H=394 kJ / mol' 'CO(s)+1/2 O_2(g) rarr CO_2(g) Delta H=-284.5 kJ / mol' the heat of formation of 1 mol of 'CO(g)' is

Calculate the enthalpy of formation of ethăne from the following data: i) 'C(s)+O_2(g) eq CO_2(g) , Delta_r H^circ=-393.5 kJ' ii) 'H_2(g)+1/2 O_2(g) rarr H_2 O(l) , Delta_r H^circ=-285.8 k J' iiii) 'C_2 H_6(g)+7/2 O_2(g) rarr 2 CO_2(g)+3 H_2 O(l) , Delta_r H^circ=1560.0 kJ'