4.0 L of an ideal gas is allowed to expand isothermally into vacuum until the total volume is 2.0 L. The amount of heat absorbed in this expansion is ____________ L atm.
Answer (integer)
0
Solution
Work done $=-P_{\text {ext }} \Delta \mathrm{v}$
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$\because P_{\text {ext }}=0 \quad \text { (vacuum) }$
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$\therefore w=0, \quad\Delta U=0$ (as the process is isothermal)
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So, $q=0$
About this question
Subject: Chemistry · Chapter: Thermodynamics · Topic: Zeroth and First Law
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