alleryStart learning →In the Arrhenius equation, what value does the gas constant R take?
A8.314 J/mol/K
B2.7183 J/mol/K
C0.0821 J/mol/K
D6.022 J/mol/K
Answer & Solution
Correct answer: A. 8.314 J/mol/K
1. The Arrhenius equation is k = A times e raised to the power minus Ea over RT.
2. R in that expression is the ideal gas constant, equal to 8.314 J/mol/K.
3. Temperature T must be entered on the Kelvin scale for these units to work.
4. The figure 2.7183 is the constant e itself, not R.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 12 "Kinetics", section 12.5 Collision Theory_
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