Concept explainers
Interpretation:
The temperature at which the equilibrium pressure of water vapor is 75 torr needs to be determined.
Concept introduction:
The Gibb’s equation of
With the help of this equation one can predict the change in
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- A 4.72-g sample of methanol (CH3OH) was placed in an otherwise empty 1.00-L flask and heated to 250.C to vaporize the methanol. Over time, the methanol vapor decomposed by the following reaction: CH3OH(g)CO(g)+2H2(g) After the system has reached equilibrium, a tiny hole is drilled in the side of the flask allowing gaseous compounds to effuse out of the flask. Measurements of the effusing gas show that it contains 33.0 times as much H2(g) as CH3OH(g). Calculate K for this reaction at 250.C.arrow_forwardComplete the changes in concentrations (or pressure, if requested) for each of the following reactions. (a) 2SO3(g)2SO2+O2(g) + x 0.125 M (b) 4NH3(g)+3O2(g)2N2(g)+6H2O(g) 3x 0.24 M (c) Change in pressure: 2CH4(g)C2H2(g)+3H2(g) x 25 torr (d) Change in pressure: CH4(g)+H2O(g)CO(g)+3H2(g) x 5 atm (e) CH4CI(s)NH3(g)+HCI(g) x 1.03104 M (e) Change in pressure: Ni(s)+4CO(g)Ni(CO)4(g) 4x 0.40 atmarrow_forwardAt a certain temperature, K=0.29 for the decomposition of two moles of iodine trichloride, ICl3(s), to chlorine and iodine gases. The partial pressure of chlorine gas at equilibrium is three times that of iodine gas. What are the partial pressures of iodine and chlorine at equilibrium?arrow_forward
- For the equilibrium 2 SO2(g) + O2(g) 2 SO3(g) Kc = 245 (at 1000 K) the equilibrium concentrations are [SO2] = 0.102, [O2] = 0.0132, and [SO3] = 0.184. The concentration of SO2 is suddenly doubled. Show that the forward reaction takes place to reach a new equilibrium.arrow_forwardFor the reaction N2(g)+3H2(g)2NH3(g) show that Kc = Kp(RT)2 Do not use the formula Kp = Kc(RT)5n given in the text. Start from the fact that Pi = [i]RT, where Pi is the partial pressure of substance i and [i] is its molar concentration. Substitute into Kc.arrow_forwardThe following two diagrams represent the composition of an equilibrium mixture for the reaction A2 + B2 2AB at two different temperatures. Based on the diagrams, is the chemical reaction endothermic or exothermic? Explain your answer using Le Chteliers principle. (A atoms are red and B atoms are green in the diagrams.)arrow_forward
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