Chapter 19, Problem 83a
Determine the sign of ΔSsys for each process. a. water boiling
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Consider the reaction: I2(g) + Cl2(g) ⇌ 2 ICl(g) Kp = 81.9 at 25 °C Calculate ΔG rxn for the reaction at 25 °C under each of the following conditions: c. PICl = 2.55 atm; PI2 = 0.325 atm; PCl2 = 0.221 atm
Consider the reaction: 2 NO( g) + O2( g) ⇌ 2 NO2( g) The following data show the equilibrium constant for this reaction measured at several different temperatures. Use the data to find ΔH° rxn and ΔS°rxn for the reaction.
A reaction has an equilibrium constant of 8.5⨉103 at 298 K. At 755 K, the equilibrium constant is 0.65. Find ΔH°rxn for the reaction.
Determine the sign of ΔSsys for each process. b. water freezing
Nitrogen dioxide, a pollutant in the atmosphere, can combine with water to form nitric acid. One of the possible reactions is shown here. Calculate ΔG° and K p for this reaction at 25 °C and comment on the spontaneity of the reaction. 3 NO2(g) + H2O(l )→ 2 HNO3(aq) + NO(g)
Consider this reaction occurring at 298 K: N2O(g) + NO2(g) ⇌ 3 NO(g) a. Show that the reaction is not spontaneous under standard conditions by calculating ΔG°rxn.