Question

Methanol (CH3OH) is made industrially in two steps from CO and H2. It is so cheap to make that it is being considered for use as a precursor to hydrocarbon fuels such as methane (CH4) Step 1. CO(g) 2H2 (g) - CH3OH(l) AS® = -332J/K Step 2. CH3OH(I) -CH4 (g) 1/202 (g) AS° = 162J/K Part A Calculate AI (in kilojoules) for step 1 Express your answer using four significant figures. Π ΑΣφ. ΔΗ- kJ Request Answer Submit Part B Calculate AGo (in kilojoules) for step 1. Πνα ΑΣφ AGf kJ Submit Request Answer Part C Is step 1 spontaneous at 298 K? Yes No

Answer 1

Selution PantA Jiven Step 1 Reachon, cO1+2H212 Ch,OH 2-332 JK As We know het 4Hproduet4Hreacant KTmot 2 38. Thus 2-236 7 --1 10S+03 128.2 k7m Ans Solution Part Know that As you Here Cstsudaud femperctuse at sTp) T2 298 k 26. 2k 290x-222) J Phheus44 98 936 J 128.2KJ F129 2 K7 98 936 ky - 29.264jks Ans

Solution Pant c Feaction is not Spontaneay reaction at eguidibium reachion is Spontaneous we know that 49 0 9f 44 20 44D we See fom partla) is Spontancous Thus reachion Part D Solution fo the eachon spontaneity mut be negative C. e 4G0 Andl we kuow for AS Value than nejahve AM have more TAS meve impotent Simce AH ve this implies Hhet (-Tas= tve ve 4S at hih temperatue at Jow temperetne + ve 44 7 ve

Part E Solution :- fr spoutenoes 94 we take T 386 4G20 Then AH TOS t we take hgh temporahue Hah 36G, (e. T886 theu SHTAS 490 this implies that for 40 Temper atue must T38 Thus for Sponteneous Temperature Tbelow 3 So, ophon A i's Correct