Question

At a temperature, $TinK$, the pressure of $4g$ argon in a bulb is $P$. The bulb is put in a bath having a temperature higher by $50K$ than the first one. $0.8g$ of argon gas had to be removed to maintain original pressure. The temperature $T$ is equal to :

• A. $510K$
• B. $200K$
• C. $100K$
• D. $73K$

Answer 1

The correct option is B $200K$

The temperature is changed from T to $T+50$ K.
Mass (W) is changed from 4 g to $(4-0.8)=3.2$ g
$WT=W^{\prime }{T}^{\prime }$
$4g\times TK=3.2g\times (T+50)K$
$4T=3.2T+160$
$0.8T=160$
$T=200$ K