States of Matter 1 Question 31
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31. The density of neon will be highest at
======= ####31. The density of neon will be highest at
3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed (a) STP
(b) $0^{\circ} \mathrm{C}, 2 \mathrm{~atm}$
(c) $273^{\circ} \mathrm{C}, 1 \mathrm{~atm}$
(d) $273^{\circ} \mathrm{C}, 2 \mathrm{~atm}$
$(1990,1 M)$
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Solution:
- The ideal gas equation, $p V=n R T=\frac{w}{M} R T$
$$ \begin{array}{rlrl} \Rightarrow & & p M & =\left(\frac{w}{V}\right) R T=d R T \quad(d=\text { density }) \ \Rightarrow & d & =\frac{p M}{R T} \end{array} $$
i.e. density will be greater at low temperature and high pressure.
