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Which of the following will involve evol...

Which of the following will involve evolution of heat ?

A

Dissolution of conc. `H_(2)SO_(4)` in water

B

Formation of NO in atmosphere

C

Conversion of molecular hydrogen to atomic hydrogen

D

Formation of water gas from coal and steam

Text Solution

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The correct Answer is:
A
Dissolution of sulphuric acid in water is exothermic
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NARAYNA-THERMODYNAMICS-Level-II (H.W)
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  2. In the following process/es Delta H lt Delta U (A) C(s) + O(2)(g) ra...

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  3. Which of the following will involve evolution of heat ?

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  4. The sublimation energy of I(2) (solid) is 57.3 KJ/mole and enthalpy o...

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  5. Given the enthalpy of formation of CO(2)(g) is -94.0 KJ, of CaO(s) is ...

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  6. C+O(2)rarr CO(2), Delta H = -94 K.cal, CO+(1)/(2)O(2) rarr CO(2), Delt...

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  7. What is the heat of formation of C(6)H(6), given that the heats of com...

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  8. How much energy is released when 6 mole of octane is burnt in ? Given ...

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  9. The heat of combustion of methane is -880 KJ mol^(-1). The quantity of...

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  10. When 6g carbon is burnt in a sufficient amount of oxygen, the heat evo...

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  11. The heats of combustion of C(2)H(4), C(2)H(6) and H(2) gases are -1409...

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  12. The enthalpies of formation of CO and CO(2) are -110.5 KJ mol^(-1) and...

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  13. When 14 grams of ethene is completely burnt in oxygen, the heat evolve...

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  14. H(2)O((g)) rarr H((g))+OH((g))Delta H = x(1) OH((g)) rarr H((g))+O((...

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  15. Heat evolved in the reaction H(2)+Cl(2) rarr 2HCl is 182 kJ Bond ene...

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  16. C(6)H(6) rarr C(6)H(12)Delta H = -204 KJ heat of hydrognentaion of eac...

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  17. The direct conversion of A to B is difficult, hence is carried out by ...

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  18. CaCO(3(s)) rarr CaO((s))+CO(2(g))Delta H = +180 KJ If entropies of lim...

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  19. In which of the following reactions the entropy change is positive ?

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  20. Calculate the free energy change for the following reaction at 300 K. ...

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