CP13. When a copper wire is exposed to air at room temperature, it becomes coated with a black oxide, CuO. If the wire is heated above a certain temperature, the black oxide is converted to a red oxide,Cu2O. At a still higher temperature, the oxide coating disappears. Explain these observations in terms of the thermodynamics of the reactions: 2 CuO(s) → Cu2O(s) + ½ O2(g) Cu2O(s) → 2 Cu(s) + ½ O2(g) and estimate the temperatures at which the changes occur.

Q3/ If 500 g of Na2SO4 is dissolved in 800 g of H2O and the solution is cooled until 200 g of NazSO4.10H2O crystallizes out; Find: a- The composition of the remaining solution (the mother liquor). b- the grams of crystals recovered per 100 g of initial solution.

4.131. Compute the heat of reaction at 600 K for the following reaction: S(l) + O2(g) SO2(g)

Please answer completely and legibly.

A gas mixture containing CH4 (g) used as fuel is obtained as follows. 4CO (g) + 8H2 (g) → 3CH4 (g) + CO2 (g) + 2H2O (s) Find the H ° for this reaction, using the following data as required. C (graphite) + 1 / 2O2 (g) → CO (g) ∆H ° = -110.5 kJ CO (g) + 1 / 2O2 (g) → CO2 (g) ∆H ° = - 283.0 kJ H2 (g) + 1 / 2O2 (g) → H2O (s) ∆H ° = -285,8kJ C (graphite) + 2H2 (g) → CH4 (g) ∆H ° = -74.81 kJ CH4 (g) + 2O2 (g)) → CO2 (g) + 2H2O (s) ∆H ° = -890,3kJ

How much heat will be released when 1.48 g of chlorine reacts with excess phosphorus according to the following equation? Rxn: 2P + 5Cl2 → 2PCl5 ΔH° = -886 kJ Answer: _ kJ

mixture. 2. Gas A is reacted with gas B in a batch reactor: A + 3B → 3C Stoichiometric ratio of A and B are mixed in the fixed volume reactor at 20°C and a total absolute pressure of 2 atm. The mixture starts to react and the reaction goes to completion at 2.5 atm. What is the final temperature of the reaction mixture, assuming ideal gas behaviour?

Please help me answer at least all of the given questions. Thank you.

As reported in US Patent 4203923, cyclohexanone is an important chemical raw material in the production of nylon intermediates. The separation and purification section for cyclohexanone production usually done through a series of distillation units. Liquid mixture of cyclohexanone (1) and phenol (2) was reported to exist in equilibrium with its vapor at 144 °C (417.15K). The system conforms closely to Modified Raoult’s Law. The mixture forms azeotrope at composition of 0.695. (Refer Table) (a) Provide a sketch that clearly shows that the system exhibits azeotrope(α12)x1=0 = P1sat eA / P2sat and (α12)x1=1 = P1sat / P2sat eA (b) State Paz and sketch a P-xy diagram of the system

Problem 4. We desire to produce cumene (C₂H₁2; let's call it C) from propylene (P) and benzene (B): C3H6+ C6H6 → C9H12 In our preliminary design, a mixture of 95 mol% propylene and 5 mol% propane (an inert gas in this process, so let's call it I) is blended with benzene at a molar ratio of 1.2 moles propylene to 1 mole benzene. This combined "fresh feed" is mixed with two recycled streams, then fed to a reactor. At the reactor conditions, the above reaction occurs, consuming 60% of the available benzene. However, cumene is part of an unwanted side reaction that makes diisopropylbenzene (D): C3H6+ C9H12 → C12H18 and 5% of the cumene generated by the first reaction is consumed by this side reaction. The reactor effluent is cooled and sent to a multi-stage separation unit, which ultimately results in four exit streams: a vapor stream containing propylene and propane, and three pure liquid streams, containing benzene, cumene, and diisopropylbenzene. The vapor stream leaving the separator…