Which of the following sets of systems are in order of increasing entropy? AH,(8), HBrO,(8), HBr(g) B He (g), Ar(g), Ne (g) © He (8), Cl,(g). P,(8) DH,0(1), H,0(s), H,0 (s)

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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question 1
Which of the following sets of systems are in order of increasing entropy?
H,(8), HBr0 (8), HBr(g)
A
В
He (g), Ar(g), Ne (g)
He (8), Cl,(g), P4(8)
O H,0(1), H,0 (8), H¸0 (3)
D
Question 2
A reaction has A H° =100 kJ/mol and AS° =250 J/mol – K įndicating that it is nonspontaneous at room temperature. Under
what temperature conditions will it become spontaneous? You will have to calculate AG°.
A
410°K
B
298°K
303° К
278°K
Question 3
"Thermite" reactions have been used for welding metal parts, such as railway rails and in metal refining. One such thermite reaction
is Fe,0,(s) + 2Al(s) → Al,0,(s) + 2Fe(s). During this reaction, the surroundings absorb 851.8 kJ/mol of heat, which indicates
that this reaction is spontaneous at room temperature under standard conditions.
A) True
В
False
Transcribed Image Text:Question 1 Which of the following sets of systems are in order of increasing entropy? H,(8), HBr0 (8), HBr(g) A В He (g), Ar(g), Ne (g) He (8), Cl,(g), P4(8) O H,0(1), H,0 (8), H¸0 (3) D Question 2 A reaction has A H° =100 kJ/mol and AS° =250 J/mol – K įndicating that it is nonspontaneous at room temperature. Under what temperature conditions will it become spontaneous? You will have to calculate AG°. A 410°K B 298°K 303° К 278°K Question 3 "Thermite" reactions have been used for welding metal parts, such as railway rails and in metal refining. One such thermite reaction is Fe,0,(s) + 2Al(s) → Al,0,(s) + 2Fe(s). During this reaction, the surroundings absorb 851.8 kJ/mol of heat, which indicates that this reaction is spontaneous at room temperature under standard conditions. A) True В False
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