Question

Как измениться скорость некоторой реакции при повышении температуры от 20 до 50 С, если температурный коэффициент равен 2,5?

Answer 1

Бутед 20 и 3..............

Answer 2

Changing Reaction Rate with Temperature Increase

To calculate how the speed of a reaction changes when the temperature increases from 20°C to 50°C, we can use the Arrhenius equation, which describes the relationship between the rate constant of a reaction and the temperature. The Arrhenius equation is given by:

k = A * e^(-Ea/RT)

Where: - k is the rate constant - A is the pre-exponential factor - Ea is the activation energy - R is the gas constant - T is the temperature in Kelvin

Applying the Temperature Coefficient

Given the temperature coefficient (Q10) of 2.5, we can use it to calculate the change in rate constant when the temperature increases by 10°C. The Q10 value is used to express the proportional change in a rate of a biological or chemical system for a 10-degree change in temperature.

The Q10 relationship is given by:

Q10 = (k2/k1)^(10/(T2-T1))

Where: - k1 and k2 are the rate constants at temperatures T1 and T2 respectively

Calculation

Let's calculate the change in the rate constant when the temperature increases from 20°C to 50°C using the given temperature coefficient of 2.5.

Given: - Initial temperature (T1) = 20°C - Final temperature (T2) = 50°C - Temperature coefficient (Q10) = 2.5

Using the Q10 relationship, we can calculate the change in the rate constant.

Result

The change in the rate constant when the temperature increases from 20°C to 50°C, with a temperature coefficient of 2.5, is approximately 11.18.

This calculation is based on the given temperature coefficient and the temperature change, and it provides an estimation of the change in the rate constant for the reaction.