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DeltaE=E("initial state")-E("final state...

`DeltaE=E_("initial state")-E_("final state")`

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Internal Energy (E,also denoted by U): Every system having some quantity of matter is associated with a definite amount of energy, called internal energy. E=E_("Transiational")+E_("Rotational")+E_("Vibrational")+E_("bonding")+ .... DeltaE=E_("Final")-E_("initial") DeltaE=q_v , heat supplied to a gas at constant volume, since all the heat supplied goes to increase the internal energy to the gas. It is an extensive property & a state function.It is exclusively a function of temperature. If DeltaT=0 , DeltaE=0 as well. The internal energy of a certain substance is given by the following equation : U=3 PV+84 where U is given in kJ/kg, P is in kPa, and V is in m^3//kg A system composed of 3 kg of this substance expands from an initial pressure of 400 kPa and a volume of A 0.2 m^3 to a final pressure 100 kPa in a process in which pressure and volume are related by PV^2 =constant. If the expansion is quasi-static, then the value of q is :

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ICSE-CHEMICAL THERMODYNAMICS -TRUE OR FALSE. TYPE QUESTIONS
  1. For an isobaric process, DeltaP=0.

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  2. What is the sign convention for work?

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  3. Work done in the isothermal reversible expansion of a gas is always gr...

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  4. The total energy of the universe is increasing day by day.

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  5. DeltaE=E("initial state")-E("final state")

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  6. The heat absorbed in a reaction at constant temperature and constant v...

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  7. A bomb calorimeter measures DeltaG of a combustion process.

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  8. For the reaction, Zn(s) + 2HCl (aq) to ZnCl 2(aq) + H2(g) , DeltaH...

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  9. Decomposition of CaCO3 is a reversible reaction when carried out in ...

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  10. State True/False All spontaneous process proceed in one direction on...

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  11. The units of DeltaS are JK^(-1) mol^(-1).

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  12. The absolute entropy of a liquid is less than of the solid.

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  13. Is the entropy of the universe constant ?

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  14. A process is non-spontaneous when DeltaS("total") lt 0.

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  15. For an irreversible process, DeltaS gt 0.

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  16. Heat can be converted completely into equivalent amount of work withou...

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  17. A chemical process always proceeds in the direction in which the Gibbs...

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  18. A process is feasible if ΔH is positive and ΔS is negative

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  19. DeltaG is a measure of the net work done by a system. True/False.

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  20. At absolute zero, the entropy of a pure crystal is zero. This is

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