<p>Two blocks of the same metal having same mass and at temperature&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>T</mi><mn>1</mn></msub><mo>&#160;</mo><mi>a</mi><mi>n</mi><mi>d</mi><mo>&#160;</mo><msub><mi>T</mi><mn>2</mn></msub></math>&nbsp;respectively are brought in contact with each other and allowed to attain thermal equilibrium at constant pressure.The change in entropy,&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML" class="wrs_chemistry"><mo>&#8710;</mo></math>S for the process is:</p>