Problem Set III Key

Problem Set III Key - Problem Set III: Energy Metabolism...

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Problem Set III: Energy Metabolism and Temperature 1) Assume the metabolic rate of a small frog is 25 ul O 2 /g · h at a temperature of 10 ºC. What are the metabolic rates of the frog at temperatures of 20, 30 and 40 ºC if the Q 10 is 2? What are the rates at these temperatures if the Q 10 is 2.5? 1.0? SOLUTION: 10ºC 20ºC 30ºC 40ºC Q 10 2.0: 25 50 100 200 2.5: 25 62.5 156 391 1.0: 25 25 25 25 Solve from: R 2 = R 1 (Q 10 ) (T2-T1/10) 2) The reaction rates for a process (units arbitrary) are given below for three different temperatures. (A) Calculate the Q 10 values for each temperature interval (i.e., 17-25; 25- 30). (B) Within which temperature interval is the reaction rate most sensitive to temperature change? Temperature, ºC Reaction Rate 17 100 25 175 30 300 SOLUTION: Solve from: Q 10 = (R 2 /R 1 ) (10/T 2 -T 1 ) (A) Interval Q 10 17-25 2.0 25-30 2.9 (B) 25-30 is the interval in which the reaction rate is most sensitive to temperature, because the Q 10 is larger.
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3) If the reaction rate for a process is 5 units at 15 ºC, what would be the reaction rate at
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Problem Set III Key - Problem Set III: Energy Metabolism...

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