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5. Thermodynamics and thermochemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
What happens when methane undergoes combustion in systems A and B respectively?
System $A$ System $B$
Temprature rise Temprature remains same
  • ✓
    System $A$ System $B$
    Adiabatic system Temprature rise
  • B
    System $A$ System $B$
    Temprature falls Diathermic system
  • C
    System $A$ System $B$
    Temprature falls Temprature remains same
  • D
    System $A$ System $B$
    Temprature remains same Temprature rise
✓

Answer

Correct option: A.
System $A$ System $B$
Adiabatic system Temprature rise
a
Adiabatic boundary does not allow heat exchange thus heat generated in container can't escape out thereby increasing the temperature.

In case of Diathermic container, heat flow can occur to maintain the constant temperature.

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