Chemical Thermodynamics — Chemistry STD 12 Science — Question
Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryChemical Thermodynamics1 Mark
MCQ
The first law of thermondynamics for isothermal process is
✓
$q=-W$
B
$\Delta U=W$
C
$\Delta U=q$
D
$\Delta U=-qv$
✓
Answer
Correct option: A.
$q=-W$
$(a):$ First law of thermodynamics is $\Delta U=q+W$ where, $\Delta U=$ Change in internal enengy
$q -$ heat, $W=$ work done
For an isothermal process, internal energy change is zero,
i.e. $\Delta U=0$
$\therefore 0=q+W \Rightarrow q=-W$
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