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Chapter 13: Q30E (page 752)

What is the approximate value of the equilibrium constant KP for the change C2H5OC2H5 (濒)鈬孋2 H5OC2H5 (g) at 25 掳C.

(Vapor pressure was described in the previous chapter on liquids and solids; refer back to this chapter to find the relevant information needed to solve this problem.)

Short Answer

Expert verified

\({K_p} = 0.7\;{\rm{atm}}{\rm{.}}\)

Step by step solution

01

Vapor pressure of Diethyl ether:

The reaction given

The pressure of a diethyl ether vapor at 25oc is \(0.7\;{\rm{atm}}{\rm{.}}\)

02

The approximate value of the equilibrium constant KP:

Let us calculate the equilibrium constant \({{\rm{K}}_{\rm{p}}}\) for the change at 25oc

The equilibrium constant\({{\rm{K}}_{\rm{p}}}:\)

\(\begin{array}{l}{K_p} = \frac{{{P_{{C_2}{H_5}O{C_2}{H_5}(g)}}}}{1}\\\;\;\;\;\; = {P_{{C_2}{H_5}O{C_2}{H_5}(g)}}\\\;\;\;\;\; = 0.7\;{\rm{atm}}{\rm{.}}\end{array}\)

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Most popular questions from this chapter

Convert the values of Kc to values of Kp or the values of Kp to values of Kc .

\((a)\,{N_2}\left( g \right) + 3{H_2}\left( g \right)\rightleftharpoons 2N{H_3}(g)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{K_C} = 0.50\,\,at\,\,400^\circ C\)

\((b){{\rm{H}}_2}(g) + {{\rm{I}}_2}(g)\rightleftharpoons 2HI(g)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{K_c} = 50.2\,at\,{448^\circ }{\rm{C}}\)

\((c)N{a_2}{\rm{S}}{{\rm{O}}_4} \cdot 10{{\rm{H}}_2}O(s)\rightleftharpoons N{a_2}{\rm{S}}{{\rm{O}}_4}(s) + 10{{\rm{H}}_2}O(g){K_P} = 4.08 \times {10^{ - 25}}at\,{25^\circ }{\rm{C}}\)

\((d){{\rm{H}}_2}{\rm{O}}(l)\rightleftharpoons {{\rm{H}}_2}{\rm{O}}(g)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{K_P} = 0.122\,at\,{50^\circ }{\rm{C}}\)

Question: Calculate the pressures of NO, Cl2, and NOCl in an equilibrium mixture produced by the reaction of a starting mixture with 4.0 atm NO and 2.0 atm Cl2. (Hint: KP is small; assume the reverse reaction goes to completion then comes back to equilibrium.)

Question: Antimony pentachloride decomposes according to this equation:

An equilibrium mixture in a 5.00-L flask at 4480C contains 3.85 g of \({\rm{SbC}}{{\rm{l}}_5}\),9.14 g of \({\rm{SbC}}{{\rm{l}}_3}\)and 2.84 g of \({\rm{C}}{{\rm{l}}_2}\).How many grams of each will be found if the mixture is transferred into a 2.00-L flask at the same temperature?

What is the pressure of \(C{O_2}\)in a mixture at equilibrium that contains \(0.50atm\)\({H_2}\), \(2.0atm\)of \({H_2}O\), and \(1.0atm\)of \(CO\) at \(99{0^0}C\)?

\({H_2}(g) + C{O_2}(g) \rightleftharpoons {H_2}O(g) + CO(g)\)

\({K_P} = 1.6\,at\, 99{0^o}C\)

At a temperature of 60 虋C, the vapor pressure of water is 0.196atm. What is the value of the equilibrium constant Kp for the transformation at 60 虋C? H2O (l)鈬� H2O(g)

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