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Establish a relationship between DeltaH ...

Establish a relationship between `DeltaH and DeltaU`. Under what conditions is `DeltaH = DeltaU` ?

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State a chemical reaction in which DeltaH and DeltaU are equal.

The enthalpy change for chemical reaction is denoted as DeltaH^(Theta) and DeltaH^(Theta) = H_(P)^(Theta) - H_(R)^(Theta) . The relation between enthalpy and internal energy is expressed by equation: DeltaH = DeltaU +DeltanRT where DeltaU = change in internal energy Deltan = change in number of moles, R = gas constant. Enthalpy of the system is given as

The enthalpy change for chemical reaction is denoted aas DeltaH^(Theta) and DeltaH^(Theta) = H_(P)^(Theta) - H_(R)^(Theta) . The relation between enthalpy and internal enegry is expressed by equation: DeltaH = DeltaU +DeltanRT where DeltaU = change in internal enegry Deltan = change in number of moles, R = gas constant. For a reaction, 2X(s) +2Y(s) rarr 2C(l) +D(g), DeltaH at 27^(@)C is -28 kcal mol^(-1). DeltaU is ..... kcal mol^(-1)

The enthalpy change for chemical reaction is denoted as DeltaH^(Theta) and DeltaH^(Theta) = H_(P)^(Theta) - H_(R)^(Theta) . The relation between enthalpy and internal enegry is expressed by equation: DeltaH = DeltaU +DeltanRT where DeltaU = change in internal enegry Deltan = change in number of moles, R = gas constant. For the change, C_("diamond") rarr C_("graphite"), DeltaH =- 1.89 kJ , if 6g of diamond and 6g of graphite are seperately burnt to yield CO_(2) the heat liberated in first case is

The enthalpy change for chemical reaction is denoted aas DeltaH^(Theta) and DeltaH^(Theta) = H_(P)^(Theta) - H_(R)^(Theta) . The relation between enthalpy and internal energy is expressed by equation: DeltaH = DeltaU +DeltanRT where DeltaU = change in internal energy Deltan = change in number of moles, R = gas constant. Which of the following equations corresponds to the definition of enthalpy of formation at 298K ?

The enthalpy change for chemical reaction is denoted aas DeltaH^(Theta) and DeltaH^(Theta) = H_(P)^(Theta) - H_(R)^(Theta) . The relation between enthalpy and internal enegry is expressed by equation: DeltaH = DeltaU +DeltanRT where DeltaU = change in internal enegry Deltan = change in number of moles, R = gas constant. Enthalpy of the system is given as

ICSE-CHEMICAL THERMODYNAMICS -SHORT ANSWER TYPE QUESTIONS
  1. Define enthalpy and enthalpy change. Show that DeltaH = qp.

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  2. Define enthalpy. Show that the change in enthalpy at constant pressure...

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  3. Establish a relationship between DeltaH and DeltaU. Under what conditi...

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  4. Predict whether the reaction, H - H (g) + Cl - Cl(g) to 2H - Cl (g),...

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  5. State and explain the second law of thermodynamics.

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  6. State a chemical reaction in which DeltaH and DeltaU are equal.

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  7. What is meant by the term 'free energy'? What was the necessity of int...

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  8. Define enthalpy and enthalpy change. Show that DeltaH = qp.

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  9. What is the free energy criterion for a process to occur spontaneously...

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  10. Explain the term 'entropy'.

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  11. State giving reason whether the following reaction would involve an in...

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  12. What do you understand by a spontaneous process ? Give two examples

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  13. What do you understand by the spontaneity of a process ? Discuss the s...

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  14. Can DeltaH be regarded as the sole criterion to explain the spontaneit...

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  15. With the help of at least two examples show that randomness increases ...

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  16. What is entropy and in what units is it expressed ? Discuss the physic...

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  17. For the reaction 2H(g)rarr H(2)(g), the sign of DeltaH and DeltaS resp...

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  18. What happens to the entropy when a gas undergoes expansion ? Explain.

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  19. Is the entropy of the universe constant ?

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  20. State and explain the second law of thermodynamics. Mention the essent...

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