January 2013 Chemistry Regents #52-54

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Base your answers to questions 52 to 54 on the information below.

Base your answers to questions 52 through 54 on the information below.

The potential energy diagram and balanced equation shown below represent a reaction between solid carbon and hydrogen gas to produce 1 mole of C2H4(g) at 101.3 kPa and 298 K.

52 State what interval 3 represents. [1]

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Interval 3 represents the difference in potential energy between the products and the reactants.

Interval 3 represents the heat of reaction, 52.4 kJ.

DH

53 Determine the net amount of energy absorbed when 2.00 moles of C2H4(g) are produced. [1]

HIGHLIGHT TO SEE THE ANSWER

104.8kJ

54 Identify one change in the reaction conditions, other than adding a catalyst, that can  increase the rate of this reaction. [1]

HIGHLIGHT TO SEE THE ANSWER

Increase the temperature.

Increase the pressure.

Increase the concentration of H2(g).

Increase the surface area of the carbon.

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Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Questions 51 Questions 52-54 Questions 55-58 Questions 59-61 Questions 62-65 Questions 66-69

Questions 70-72 Questions 73-76 Questions 77-79 Questions 80-82 Questions 83-85

 

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