<p>The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of 10&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>d</mi><msup><mi>m</mi><mn>3</mn></msup></math>&nbsp;to a volume of&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mn>100</mn><mo>&#160;</mo><mi>d</mi><msup><mi>m</mi><mn>3</mn></msup></math>&nbsp;at&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML" class="wrs_chemistry"><msup><mn>27</mn><mo>&#176;</mo></msup></math>C is:</p>