हिंदी

Classify the following into intensive and extensive properties. Pressure, volume, mass, temperature.

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प्रश्न

Classify the following into intensive and extensive properties.

Pressure, volume, mass, temperature.

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उत्तर

Intensive Extensive
Pressure Volume
Temperature Mass
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अध्याय 4: Chemical Thermodynamics - Long answer questions

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संबंधित प्रश्न

Select the most appropriate option.

Which of the following reactions is exothermic?


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What is the standard enthalpy of combustion? Give an example.


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State and explain Hess’s law of constant heat summation.


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Define standard enthalpy of formation.


Calculate the standard enthalpy of formation of liquid methanol from the following data:

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  2. \[\ce{C_{(Graphite)} + O_{2(g)} -> CO_{2(g)}}\]          ∆cH° = – 393 kJ mol–1
  3. \[\ce{H_{2(g)} + \frac{1}{2} O_{2(g)} -> H2O_{(l)}}\]          ∆fH° = – 286 kJ mol–1 

Define the Bond enthalpy.


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When 6.0 g of graphite reacts with dihydrogen to give methane gas, 37.4 kJ of heat is liberated. What is standard enthalpy of formation of CH4 (g)?


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Which of the following equations has ΔfH° and ΔH° same?


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H – H bond energy: 431.37 kJ mol−1

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C – C bond energy: 336.49 kJ mol−1

C – H bond energy: 410.50 kJ mol−1

Enthalpy for the given reaction will be:

\[\begin{array}{cc}
\phantom{}\ce{H}\phantom{...}\ce{H}\phantom{...................}\ce{H}\phantom{...}\ce{H}\phantom{....}\\
\phantom{.}|\phantom{....}|\phantom{....................}|\phantom{....}|\phantom{.....}\\
\ce{C = C + H - H -> H - C - C - H}\\
\phantom{.}|\phantom{....}|\phantom{....................}|\phantom{....}|\phantom{.....}\\
\phantom{}\ce{H}\phantom{...}\ce{H}\phantom{...................}\ce{H}\phantom{...}\ce{H}\phantom{....}
\end{array}\]


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  1. activated complex
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Calculate the standard enthalpy of combustion of methane if the standard enthalpy of formation of methane, carbon dioxide and water are −74.8, −393.5 and −285.8 kJmol−1 respectively.


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