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

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
What is the final temperature of $0.10\, mole$ monoatomic ideal gas that performs $75\, cal$ of work adiabatically if the initial temp is $227\,^oC$ ? .......$K$
(use $R = 2\, cal/K-mol$)
  • ✓
    $250$
  • B
    $300 $
  • C
    $350 $
  • D
    $750$
✓

Answer

Correct option: A.
$250$
a
$\Delta \mathrm{U}=\mathrm{W}$

$-75=0.1 \times \frac{3}{2} \times 2\left(\mathrm{T}_{2}-500\right)$

$\mathrm{T}_{2}=250 \,\mathrm{K}$

 

 

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