Textbook for Class XI Chemistry Part I>Chapter 6 - Thermodynamics>EXERCISES>Q 6.2

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For the process to occur under adiabatic conditions, the correct condition is:

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Important Questions on Thermodynamics

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Textbook for Class XI Chemistry Part I>Chapter 6 - Thermodynamics>EXERCISES>Q 6.3

The enthalpies of all elements in their standard states are:

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Textbook for Class XI Chemistry Part I>Chapter 6 - Thermodynamics>EXERCISES>Q 6.4

∆ U^{⊖}

of combustion of methane is

- X {kJmol}^{- 1}

. The value of

∆ H^{⊖}

is

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Textbook for Class XI Chemistry Part I>Chapter 6 - Thermodynamics>EXERCISES>Q 6.5

The enthalpy of combustion of methane, graphite and dihydrogen at

298 K

are,

- 890 .3 kJ {mol}^{- 1} - 393 .5 kJ {mol}^{- 1},

and

- 285 .8 kJ {mol}^{- 1}

respectively. Enthalpy of formation of

{CH}_{4} (g)

will be

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Textbook for Class XI Chemistry Part I>Chapter 6 - Thermodynamics>EXERCISES>Q 6.6

A reaction,

A + B \to C + D + q

is found to have a positive entropy change. The reaction will be

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Textbook for Class XI Chemistry Part I>Chapter 6 - Thermodynamics>EXERCISES>Q 6.7

In a process,

701 J

of heat is absorbed by a system and

394 J

of work is done by the system. What is the change in internal energy for the process?

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Textbook for Class XI Chemistry Part I>Chapter 6 - Thermodynamics>EXERCISES>Q 6.8

The reaction of cyanamide, ${NH}_{2} CN (s)$ , with dioxygen was carried out in a bomb calorimeter and $∆ U$ was found to be $- 742.7 kJ {mol}^{- 1}$ at $298 K$ . Calculate the enthalpy change for the reaction at $298 K$ .
${NH}_{2} CN (g) + \frac{3}{2} O_{2} (g) \to N_{2} (g) + {CO}_{2} (g) + H_{2} O (l)$