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In how many option (s), enthalpy change ...

In how many option (s), enthalpy change is marked incorrectly?
`CuSO_(4)(s)+5H_(2)O(g)toCuSO_(4).5H_(2)O(s),Delta_(solution)H^(@)[CuSO_(4)(s)]`
`2NH_(3)(g)toN_(2)(g)+3H_(2)(g),H_(atm)^(@)[NH_(3)]`
`Mg Cl_(2)(s)to Mg(s)+Cl_(2)(g), Delta_("lattice")H^(@)[MgCl_(2)(s)]`
`(1)/(4)P_(4)(g)toP(g), Delta_(P-P) H^(@)`

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Calculate the enthalpy of formation of methane from the following data : C(s) + O_(2)(g) to CO_(2)(g) Delta_(r)H^(@) = -393.5 kJ 2H_(2)(g) + O_(2)(g) to 2H_(2)O(l) Delta_(r)H^(@) = -571.8 kJ CH_(4)(g) + 2O_(2)(g) to CO_(2)(g) + 2H_(2)O(l) Delta_(r)H^(@) = -890.3 kJ

Determine enthalpy of formation for H_(2)O_(2)(l) , using the listed enthalpies of reaction : N_(2)H_(4)(l)+2H_(2)O_(2)(l)toN_(2)(g)+4H_(2)O(l) , " "Delta_(r)H_(1)^(@)=-818kJ//mol N_(2)H_(4)(l)+O_(2)(g)toN_(2)(g)+2H_(2)O(l) " "Delta_(r)H_(2)^(@)=-622kJ//mol H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l)" "Delta_(r)H_(3)^(@)=-285kJ//mol

Match the term given in Column I withthe equation given in Column II {:("Column I " , "Column II") , ("(A) Enthalpy of formation", (p) CuSO_(4) (s) + 5 H_(2) O (l) to CuSO_(4) 5H_(2)O), ("(B) Enthalpy of combustion" , (q) CuSO_(4) (s) + nH_(2) O (l) to CuSO_(4) (aq)),("(C) Enthalpy of solution " , (r) C(s) + O_(2) (g) to CO_(2) (g)) , ("(D) Enthalpy of hydration" , (s) CH_(4) + 2 O_(2) to CO_(2) + 2 H_(2)O):}

The equilibrium constant for the reaction CaSO_(4).5H_(2)H_(2)O(s)hArr CaSO_(4).3H_(2)O(s)+2H_(2)O(g) is equal to

What is the unit of K_(p) for the reaction ? CS_(2)(g)+4H_(4)(g)hArrCH_(4)(g)+2H_(2)S(g)

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