The rate of a reaction at 27 °C is $k$. The temperature is increased to 37 °C. Assuming the standard rule that rate roughly doubles for every 10 °C rise:
ARate is unchanged
BRate becomes ~$k/2$
CRate becomes ~$2k$
DRate becomes ~$10k$
Answer & Solution
Correct answer: C. Rate becomes ~$2k$
Empirically (and as a consequence of Arrhenius behaviour with typical activation energies), reaction rate roughly **doubles** for each 10 °C rise.
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