The most appropriate mathematical equation for first law of thermodynamics is - 1. dq = dw 2. dq= du + dw 3. du =dw Where, dq is heat absorbed, dw is work done and du is internal energy change. 2 1 1 and 2 3
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This can be mathematically represented as: \[ \Delta U = Q - W \] where: - \( \Delta U \) is the change in internal energy - \( Q \) is the heat added to the system - \( W \) is the work done by the system ** Show more…
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The first law of thermodynamics refers to energy conservation in a system in which Only the gravitational potential energy changes Only the chemical energy changes Only the thermal energy changes Only the kinetic energy changes
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(a) An infinitesimal amount of heat is added reversibly to a system. By combining the first and second laws, show that $d U=T d S-d W$. (b) When heat is added to an ideal gas, its temperature and volume change from $T_{1}$ and $V_{1}$ to $T_{2}$ and $V_{2}$ Show that the entropy change of $n$ moles of the gas is given by $\Delta S=n C_{v} \ln \frac{T_{2}}{T_{1}}+n R \ln \frac{V_{2}}{V_{1}}$
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