Calculate the standard enthalpy of formation of `CH_3OH`(l) from the following data
`CH_3OH(l)+3/2O_2(g)rarrCO_2(g)+2H_2O(l)DeltaH^theta=-726kJ`-----(1)
`C(s)+O_2(g)rarrCO_2(g) DeltaH^theta=-393kJ`-----(2)
`H_2(g)+1/2O_2(g)rarrH_2O(l) DeltaH^theta=-286kJ`-----(3)

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

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

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'

Predict the sign of entropy change in the following reactions. i) O_2(g)+2 SO_2(g) rarr 2 SO_3(g) ii) 2 H_2(g)+O_2(g) rarr 2 H_2 O(g)

Justify the following reaction is redox reaction 4NH_3(g) + 5O_2 (g) to 4NO (g) + 6H_2O (g)

Calculate the standard enthalpy change for the reaction CH_4(g) +2O_2(g) rarr CO_2(g)+2H_2O(l) Given that the standard enthalpies of formation of CH_4(g),CO_2(g), and H_2O(l) are -74.8 kJ mol^-1, -393.5 kJ mol^-1 and -285.8 kJ mol^-1 respectively.