Hydrogen reacts with nitrogen to form ammonia (NH_3) according to the reaction.

Question

Hydrogen reacts with nitrogen to form ammonia (NH_3) according to the reaction. The value of is -92 38 kJ/mol. and that of Delta_S9 is -198.2 J/mol K. Estimate Delta C degree at 350 00 degree C. +1.234 times 10 A 1.50 mol sample of He occupies a volume of 2.50 L at a pressure of 14 7 atm What will be the pressure of a l .50 mol sample of H_2 gas under the same conditions 24 5 atm 29.4 atm 1.00 atm 7.33 atm According to the second law of thermodynamics. the change in the entropy of the universe during a spontaneous reaction is zero. less than the change in entropy of the system negative. greater than the change in entropy of the system positive. Carbon dioxide in the atmosphere in rainwater often lowers the pH to 5.0-5.6. The rainwater is gray. basic. neutral. acidic. poisonous.

Explanation / Answer

38.

G = H- TS

G = -92380 - (350+273)*(-198.2)

G = 31098.6 J/mol = 31.098 kJ/mol

choose D

39

note that gases do not care about molar mass, since they are separate enugh

so

expect th samee pressure ... NOTE that the answer is not writte, they probably usead H2 as 2 molecules of H+ ions

then

P1 = 1/2*P = 1/2*14.7 = 7.35 which is D , the nearest

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