Chapter 19, Problem 73c
Consider the sublimation of iodine at 25.0 °C : I2(s) → I2( g) c. Explain why iodine spontaneously sublimes in open air at 25.0 °C
Video transcript
Consider the reaction: 2 NO(g) + O2(g) → 2 NO2(g) Estimate ΔG° for this reaction at each temperature and predict whether or not the reaction is spontaneous. (Assume that ΔH° and ΔS° do not change too much within the given temperature range.) b. 715 K
Determine ΔG° for the reaction: Fe2O3(s) + 3 CO(g) → 2 Fe(s) + 3 CO2(g) Use the following reactions with known ΔG°rxn values: 2 Fe(s) + 3 2 O2(g) → Fe2O3(s) ΔG°rxn = -742.2 kJ CO( g) + 1 2 O2( g) → CO2( g) ΔG°rxn = -257.2 kJ
Consider the sublimation of iodine at 25.0 °C : I2(s) → I2( g) b. Find ΔG°rxn at 25.0 °C under the following nonstandard conditions: i. PI2 = 1.00 mmHg ii. PI2 = 0.100 mmHg
Consider the evaporation of methanol at 25.0 °C : CH3OH(l) → CH3OH(g) a. Find ΔG° r at 25.0 °C.
Consider the evaporation of methanol at 25.0 °C : CH3OH(l) → CH3OH(g) b. Find ΔG r at 25.0 °C under the following nonstandard conditions: i. PCH3OH = 150.0 mmHg ii. PCH3OH = 100.0 mmHg iii. PCH3OH = 10.0 mmHg
Consider the evaporation of methanol at 25.0 °C : CH3OH(l) → CH3OH(g) c. Explain why methanol spontaneously evaporates in open air at 25.0 °C