Question

Helium gas present in thermally insulated system at 1atm 1 litre and 300 kelvin expanded very slowly till final pressure becomes one atm find the change in entropy of the process

Answer 1

Answer:

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Explanation:

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Answer 2

Given :

Measure of heat is $1$ $joule$. Temperature is $300K$.

To find :

The change in entropy.

Explanation:

• Change in entropy can be found by following these steps.
• the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work. Because work is obtained from ordered molecular motion, the amount of entropy is also a measure of the molecular disorder, or randomness, of a system.
• Let the entropy be $S$, measure of heat be $Q$ and the temperature be $T$.
• The formula used is

         $S=\frac{Q}{T}$

• Where the measure of heat is in Joules and the temperature in Kelvin.
• Substitute the value of $Q$ and $T$ in the equation.

        $S=\frac{1}{300}$

• By dividing the values, the value of $S$ would become

        $S=0.0033$

       

Final answer :

The change in entropy is $0.0033$ $\frac{J}{K}$.