Question

100cm3 of a gas at 27°c is cooled to 20°c at constant pressure .calculate volume of a gas at 20°c

Answer 1

100 cm3=27°c

cooled to 20°c

therefore 100÷27=3.703

therefore 3.703×20=74.06

Volume of gas at 20°c is 74.06cm3

Answer 2

Answer: Volume of gas at 20⁰C = 97.66cm³

Explanation:

According to Charles's law : At constant pressure, Volume occupied by a fixed amount of gas is directly proportional to the absolute temperature.

$V\propto T$

In the mentioned problem:

Given:

Initial volume(V₁)=100 cm³

Initial Temperature(T₁)=27⁰C or 300K

Final Temperature(T₂)=20⁰C or 293K

To Find: Final volume

Calculation:

$V_{1}/V_{2}=T_{1}/T_{2}$

$100/V_{2}=300/293\\V_{2}=293\times 100/300=97.66cm^{3}$

Final volume=97.66cm³

The volume of gas at 20⁰C is 97.66cm³ that means the gas is compressed at constant pressure.

Heat needs to be removed from the system thus lowering in temperature occurs to keep the pressure constant.

For reference of the basic concepts related to this question you can visit the following links:

https://brainly.in/question/490448?referrer=searchResults

https://brainly.in/textbook-solutions/q-isobaric-process-1?source=quick-results