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(a) Calculate $\Delta G^{\circ}$ and $K_{P}$ for the following equilibrium reaction at $25^{\circ} \mathrm{C}$. The $\Delta G_{\mathrm{f}}^{\circ}$ values are 0 for $\mathrm{Cl}_{2}(g),-286 \mathrm{kJ} / \mathrm{mol}$ for $\mathrm{PCl}_{3}(g),$ and $-325 \mathrm{kJ} / \mathrm{mol}$ for $\mathrm{PCl}_{5}(g).$$\mathrm{PCl}_{5}(g) \rightleftharpoons \mathrm{PCl}_{3}(g)+\mathrm{Cl}_{2}(g)$(b) Calculate $\Delta G$ for the reaction if the partial pressures of the initial mixture are $P_{\mathrm{PC}_{5}}=0.0029$ atm, $P_{\mathrm{PCl}_{3}}=0.27 \mathrm{atm},$ and $P_{\mathrm{Cl}_{2}}=0.40 \mathrm{atm}$

48 KJ/mol

Chemistry 102

Chapter 17

Entropy, Free Energy, and Equilibrium

Thermodynamics

University of Central Florida

Rice University

Drexel University

University of Maryland - University College

Lectures

00:42

In thermodynamics, the zeroth law of thermodynamics states that if two systems are in thermal equilibrium with a third system, they are also in thermal equilibrium with each other.

01:47

A spontaneous process is one in which the total entropy of the universe increases. In a spontaneous process, the system will move from an ordered state to a disordered state, such as from ice to water, or from a solid to a gas. The concept of spontaneity was introduced by Rudolf Clausius in 1850.

04:58

(a) Calculate $\Delta G^{\…

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For the reaction$$\mat…

03:01

For the reaction PCl_5(g) …

07:27

The equilibrium constant $…

04:15

Consider the following rea…

00:58

16:59

At $207^{\circ} \mathrm{C}…

02:54

T Given the initial partia…

answer for the coach in part, a Delta had she not off. The reaction is equal to Delta G, if not into PCL Tree Place Delta Achy number Delta G. If not in to see El Tu minus Delta G, if not into p. C. L five. So by putting values behave one into yeah minus 286 plus went into zero minus one into minus 2 to 5. Killer Joel Permal. Yeah, Is it will, too? 29 killer Joel Permal. Yeah. Then KP is able to be exponents minus stilted. She note divided by rt is equal to eat exponents 39 10 rest to the power tree divided by 8.314 Multiply 298 is equal to the exponents. Minus 16 is equal to 10 rest with the power minus seven in for part B, we have Q P is equal to partial pressure off in history. In two partial pressure off B C. L two divided by partial pressure off PCL five. Okay, is it will too minus 27. Sorry. 0.27. Okay. In 2.40 divided five when 00 to 9 is equal to 37 become also vino like Delta G is equal to Delta Jeannot plus Archie. Sometimes nature law Kim Delta Jeannot is equal to 39. Multiply Mhm 10, raised to the power three hume is equal to 37 nt is equal to 298 is equal to 39 multiplied and rest of the power three plus 8.314 multiply 298 nature look, 37 is equal to We have calculated where you is for eight. Yeah 48 Kayla Joel Permal

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