Standard Enthalpy Of Formation

alpha - maltose (C_(12)H_(22)O_(11)) can be hydrolysed to glucose (C_(6)H_(12)O_(6)) according to the following reaction. C_(12)H_(22)(O_(11)(aq)+H_(2)O(l)to2C_(6)H_(12)O_(6)(aq) Given: Standard enthalpy of formation of C_(12)H_(22)O_(11)(aq)=-2238(kJ)/(mol) Standard enthalpy of formation of H_(2)O(l)=-285(kJ)/(mol) Standard enthalpy of formation of C_(6)H_(12)O_(6)(aq)=-1263(kJ)/(mol) Which of the following statements (s) is/are true?

molar standard enthalpy of combusion of ethanol is -1320 kJ, malor standard enthalpy of formation of water and CO_(2)(g) are -286 kJ//mole and -393 kJ//mole respectively. Calculate the magnitude of molar standard enthalpy of formation of ethanol.

From the standard enthalpies of formation values for some compounds (in KJ mol^(-1) ), predict which one of them will be most stable?

Find the value of Delta_(f) H^(@) for the reaction N_(2) O_(4) (g) + 3 CO(g) rarr N_(2) O (g) + 3 CO_(2) (g) Standard enthalpies of formation of CO(g), CI_(2) (g), N_(2) O (g) , and N_(2) O_(4) (g) are - 110, - 393, 81 , and 9.7 kJ mol^(-1) , respectively. Strategy : The standard enthalpy change of a reaction is equal to the sum of the standard molar enthalpie of formation of the products each miltiplied by its stiochiometric coefficient in the balanced equation, minus the corresponding sum of the standard molar enthalpies of formation of the reactants

Standard enthalpies of formation of O_(3),CO_(3),NH_(3) and HI are 142.2,-383.2,-46.2 and +25.9kJ mol^(-1) respectively. The order of their increasing stabilities will be:

The standard enthalpies of formation of three substances A, B and C are 201.6, -52.6 and -106.4 kJ respectively.Arrange them in order of decreasing stability with respect to decomposition.

Standard enthalpies of formation of O_3,CO_2,NH_3 and HI are 142.2 , - 393.2, -46.2 and +25.9 "kJmol"^(-1) respectively . The order of their increasing stabilities will be

The standard enthalpies of formation of SF_(6)(g) , S(g) and F(g) are -1150 , +280 and +85KJmol^(-1) . Thus, average bond energy of (S-F) in SF_(6) is