The first law of thermodynamics for a closed system is \( d U=d q+d w \), where \( d w=d w_{p v}...

Channel:
PW Solutions
Subscribers:
445,000
Published on ● Video Link: https://www.youtube.com/watch?v=t_Y8ReMIWPc


Duration: 2:50
2 views
0

The first law of thermodynamics for a closed system is \( d U=d q+d w \), where \( d w=d w_{p v}+d w_{\text {non-pv }} \). The most common type of \( w_{\text {non-pv }} \) is electrical work. As per IUPAC convention work done on the system is positive.
A system generates \( 50 \mathrm{~J} \) of electrical energy, has \( 150 \mathrm{~J} \) of pressure-volume work done on it by the surroundings while releasing \( 300 \mathrm{~J} \) of heat energy. What is the change in the internal energy of the system?
(a) \( -500 \)
(b) \( -100 \)
(c) \( -300 \)
(d) \( -200 \)
šŸ“²PW App Link - https://bit.ly/YTAI_PWAP
šŸŒPW Website - https://www.pw.live



Other Videos By PW Solutions


2022-10-27For first order parallel reactions \( k_{1} \) and \( k_{2} \) are 4 and \( 2 \mathrm{~min}^{-1}...
2022-10-27A gaseous compound \( A \) reacts by three independent first order processes (as shown in figure...
2022-10-27The gaseous decomposition reaction, \( A(g) \longrightarrow 2 B(g)+C(g) \) is observed to first ...
2022-10-27The reaction cis- \( X \underset{k_{b}}{\stackrel{k_{f}}{\rightleftharpoons}} \) trans- \( X \) ...
2022-10-27The units of rate of reaction and rate constant are same for a : (a) zero order reaction (b) fir...
2022-10-27A compound \( A \) dissociates by two parallel first order paths at certain temperature \[ \begi...
2022-10-27Two first order reaction have half-lives in the ratio \( 8: 1 \). Calculate the ratio of time in...
2022-10-27For a hypothetical reaction, \( \begin{array}{ll}A+3 B \longrightarrow P & \Delta H=-2 x \mathrm...
2022-10-27A \( 0.50 \mathrm{~g} \) sample of rock was found to have \( 2.5 \times 10^{-6} \mathrm{~mol} \)...
2022-10-27The activity of a radioactive nuclide \( \left(X^{100}\right) \) is \( 6.023 \) curie at a certa...
2022-10-27The first law of thermodynamics for a closed system is \( d U=d q+d w \), where \( d w=d w_{p v}...
2022-10-27The number of neutrons accompanying in the formation of \( { }_{54}^{139} \mathrm{Xe} \) and \( ...
2022-10-27Consider a reaction \( A(g) \stackrel{k=0.1 M \min ^{-1}}{\longrightarrow} 2 B(g) \). If initial...
2022-10-27If ' \( a \) ' is the initial concentration of the reactant, the half-life period of the reactio...
2022-10-27Calculate \( \Delta_{f} H^{\circ} \) (in \( \mathrm{kJ} / \mathrm{mol} \) ) for \( \mathrm{Cr}_{...
2022-10-27The graph of compressibility factor \( (Z) \) vs. \( P \) for one mole of a real gas is shown in...
2022-10-27The fat, \( \mathrm{C}_{57} \mathrm{H}_{104} \mathrm{O}_{6}(\mathrm{~s}) \), is metabolized via ...
2022-10-27For the auto-ionization of water at \( 25^{\circ} \mathrm{C}, \mathrm{H}_{2} \mathrm{O}(l) \righ...
2022-10-27Gasoline has an enthalpy of combustion \( 24000 \mathrm{~kJ} / \) gallon. When gasoline burns in...
2022-10-27When reaction is carried out at standard states then at the equilibrium : (a) \( \Delta H^{\circ...
2022-10-27Thermodynamic equilibrium involves (a) chemical equilibrium (b) mechanical equilibrium (c) therm...


Tags:
pw