Given : Enthalpy of ioinization of two acids : `triangleH^(@)(HCN)=45.2 KJ mol^(-)` `triangleH^(@)(CH_(3)COOH)=2.1 KJ mol^(-)` which relationshop for the two acids is true ?
CH_(3),COOH_(2)^(+) , is present in the solution of acetic acid in
The standard enthalpy of formation of hypothetical MgCl is -125kJ mol^(-1) and for MgCl_(2) is -642 kJ mol^(-1) . What is the enthalpy of the disproportionation of MgCl ?
If the standard molar enthalpy of formation of SO _(2 (g)) and SO _(3(g)) is - 296 . 82 kJ mol ^(-1) and -395 . 72 kJ mol ^(-1) respectively, then enthalpy change for the reaction in kJ mol ^(-1) , SO _(2 (g)) + (1)/(2) O _(2 (g)) to SO _(3(g)) , is
Which ions are present in MgO(s) Calculate the enthalpy change for the reaction Mg(s) + 1//2O_(2)(g) rarr MgO(s) What kind of enthalpy change is this? Standard enthalpy of formation of MgO. DeltaH_(atom(O))= +249 kJ mol^(-1) " " DeltaH_(atom(Mg))=+148 kJ mol^(-1) DeltaH_("1st ionisation energy" (Mg))=+738 KJ mol^(-1) " " DeltaH_(2nd "electron energy "(Mg))= +145 1 kJ mol^(-1) DeltaH _("1st electron affinity "(O))= -141 kJ mol^(-1) " " DeltaH_(2nd " electron affinity "(O)) =+798 kJ mol^(-1) DeltaH_("lattice energy "(MgO))= - 3791 kJ mol^(-1)
Bond enthalpy of bromine is 194 kJ mol^(-) . If enthalpy of vapourisation of Br_2 is +30 kJ mol^(-) , electron gain enthalpy of Br is -325 kJ mol^(-1) and hydration enthalpy of bromide is -339 kJ mol^(-1) calculate the change in enthalpy for the reaction, 1/2Br_(2)(l) + e^(-) overset(aq)(rarr) Br^(-)(aq) .
The standard enthalpies of formation of CO_(2) gas and HCOOH_((l)) are -393.7 kJ mol^(-1) and -409.2 kJ mol^(-1) respectively. Which of the following are correct?
NARENDRA AWASTHI-IONIC EEQUILIBRIUM-Assertin-Reason Type Questions
