"At 25^(@)C, the standard heat of format...

"At `25^(@)C`, the standard heat of formation of `H_(2)O(l)` is `-285.83kJ*mol^(-1)`"-What does it mean?

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At 25^(@)C the standard heat of formation of liquid benzene is +49.0 kJ*mol^(-1) -what does it mean?

At 25^(@)C the standard heat of formation of liquid H_(2)O is -286.0 kJ*mol^(-1) . Calculate the change in standard internal energy for this formation reaction.

"At 25^(@)C , the standard heat of combustion of graphite is -94300cal*mol^(-1) "-what does it mean?

At 25^(@)C , the standard heat of formation for Br_(2)(g) is 30.9kJ*mol^(-1) . At this temperature, the heat of vaporisation for Br_(2)(l) is-

At 25^(@)C the standard enthalpy of formation of freon gas (CHClF_(2)) is -480.0 kJ*mol^(-1) . Wirte down of therrmochemical equation representing the formation reaction of the compound.

At 25^(@)C , the bond dissociation energy of N_(2)(g) is 946 kJ*mol^(-1) . What does it mean ? What would be the standard atomisation enthalpy of N_(2)(g) at 25^(@)C ?

At 298K, the standard free energy of formation of H_(2)O(l)=-237.13kJ*mol^(-1) . Calcualte the value of equilibrium constant at that temperature for the following reaction: 2H_(2)O(l)to2H_(2)(g)+O_(2)(g) .

The standard heat of formation of H_2O_((l)) from its elements is –285.83 kJ. "mole"^(-1) and the standard entropy change for the same reaction is -327 JK^(-1) at 25^@C . Will the reaction be spontaneous at 25^@C ?

CHHAYA PUBLICATION-CHEMICAL THERMODYNAMICS-SHORT TYPE QUESTIONS

Given: C(graphite, s)+O(2)(g)toCO(2)(g),DeltaH^(0)=x(1) C(graphite, ...
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At 25^(@)C,DeltaH(f)^(0)=0 for graphite, but for diamond DeltaH(f)^(0)...
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Mention two applications of Hess's law.
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"At 25^(@)C, the standard heat of combustion of graphite is -94300cal*...
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"At 25^(@)C, the standard heat of formation of H(2)O(l) is -285.83kJ*m...
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(1)/(2)A(2)(g)+(1)/(2)B(2)(g)toAB(g),DeltaH=-50kcal. If the bond energ...
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C(s)+(1)/(2)O(2)(g)toCO(g),DeltaH=-110.4kJ. Does this DeltaH represent...
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Give two examples of spontaneous process.
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When an adiabatic process is said to be an isoentropic process ?
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An exothermic reaction associated with decrease in entropy takes place...
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What are the conditions of spontaneity and equilibrium for a process i...
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Cl(g)+Cl(g) toCl(2)(g). What will be the sign of DeltaH and DeltaS in ...
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Why is the entropy of ice less than that of water?
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Does the entropy of the system increase or decrease in the reaction: 2...
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Why is (DeltaS("system")+DeltaS("surroundings")) zero is a reversible ...
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Many spontaneous processes are accompanied by decrease in entropy-expl...
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Why solidification of water does not occur spontaneously although it i...
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Why is Gibbs free energy called 'free energy' ?
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