The Q10 temperature coefficient is the factor by which a rate of reaction (such as a chemical reaction) increases for each ten-degree increase in the temperature, measured in degrees Celsius. Q10 is defined by the equation Q10 = (R2/R1) ** [10/(T2-T1)], where the double asterisks denote the exponential function and Rn = the rate of reaction at temperature Tn. If you measure the reaction rate at any two temperatures, you can enter the rates and temperatures in this equation to solve for Q10.

Measure the rates of a reaction at two temperatures. Call the rates R1 at temperature T1 and R2 at temperature T2. Write the values of R1, R2, T1 and T2 on a piece of paper. This will help you to avoid confusion.

• The Q10 temperature coefficient is the factor by which a rate of reaction (such as a chemical reaction) increases for each ten-degree increase in the temperature, measured in degrees Celsius.
• Write the values of R1, R2, T1 and T2 on a piece of paper.

Compute R2/R1 and write down your answer. For example, if R1 = 8 and R2 = 24, compute 24/8 = 3.

Compute T2 -- T1 and write down your answer. In the example, say T1 = 40 degrees Celsius and T2 = 70 degrees Celsius. Then T2 -- T1 = 70 - 40 = 30.