Chemical Thermodynamics Chapter 4 Chemistry Class 12 Textbook Solution

    3. Answer in brief.

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

    Answer:- The standard enthalpy of combustion of a substance is the standard enthalpy change accompanying a reaction in which one mole of the substance in its standard state is completely oxidised

    Let's examine the reaction:

    C2H2(g) + 5/2O2(g) → 2CO2(g) + H2O(l)

    In this reaction, the standard enthalpy change (\( \Delta_{r} H^\circ \)) is -1300 kJ.

    Specifically, the -1300 kJ represents the standard enthalpy of combustion of C2H2(g).

    Q 3.3
    Q 3.4
    Q 3.5

    Chemical Thermodynamics Chapter 4 Chemistry Class 12 Textbook Solution