A balloon has a volume of 1.0L at 21.0 degrees C and 750 mmHg. What is the balloon's volume at STP ?

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A balloon has a volume of 1.0L at 21.0 degrees C and 750 mmHg. What is the balloon's volume at STP ?

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Answer 1 · 2016-08-18T10:00:42

We need first to define conditions of $STP$ $"STP"$ .

Explanation:

$Standard temperature and pressure$ $"Standard temperature and pressure"$ specifies $273.15 \cdot K$ $273.15*K$ and $100 \cdot k P a$ $100*kPa$ $=$ $=$ $1 bar$ $"1 bar"$

Now $1 bar$ $"1 bar"$ $\equiv$ $-=$ $750 mm Hg$ $"750 mm Hg"$

Thus $(cancelP_1V_1)/T_1$ $=$ $(cancelP_2V_2)/T_2$

$V_2$ $=$ $V_1/T_1xxT_2$ $=$ $1.0*Lxx(294.15*K)/(273.15*K)$ $=$ $"a bit over 1 litre"$ .

The volume increase makes sense as we increase the temperature, we should increase the volume of a fixed quantity of gas.

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A balloon has a volume of 1.0L at 21.0 degrees C and 750 mmHg. What is the balloon's volume at STP ?

1 Answer

Explanation:

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