I really need help with these true false questions. 1. A reactin is performed at

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I really need help with these true false questions.

1. A reactin is performed at two different remperatures, 200 K and 450 K. The rate constant is determined at each temp, and these are shown below.

At temp = 200 K K200K = 1.7 x 10-3 M/s

At temp = 450 K K450K = 2.4 x 10-2 M/s

T or F The reaction at 200 K is more endothermic than at 450 K. Explain your answer

T or F The reaction is faster at 450 K than at 200 K. Explain your answer

T or F The reaction has a greater energy of activation at 450 K than at 200 K. Explain your answer

SHOWN. EAPLANAT TOONS MAY BE WORTH MORE THAN NUMERICAL ANSWERS RTH MORE THAN NUM (1.2 pts) A reaction is performed a two different temperatures, 200 K and 450 K.The rate constant is determined at each temp, and these are shown below. At temperature 200 K: k 200 K 1.7 x 10-3 M/s At temperature- 450 K k 2.4 x 10 M/s Circle T if the statement is TRUE and Fifit is FALSE (or not necessarily true). Explain each choice. Your 150 K explanation is 90% of the point value. T F The reaction at 200 K is more endothermic than at 450 K T F The reaction is faster at 450 K than at 200 K T F the reaction has a greater energy of activation at 450 K than at 200 K T F the reaction has a larger equilibrium constant at 200 K than at 450 K. The reaction equilibrium constant at zook us 1.7 x (D z ls and the ecu uilibri um constant at 4 so k is 2. z Mls is 2.4 x 10-12. meaning, k 25OK is 2.2. vwo less than K

Explanation / Answer

Since the rate is decreased, then, as we decrease T, we do NOT favour rate, s this is NOT endothermic, actually is exothermic

True, since the "k" value is greater for T = 450, meaning the Rate = K*[A] is faster, since K is directly proportional to the rate

False, must likely the Activation energy is constant in that interval of temperatures

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