Enter the change in entropy during polymerization and the change in enthalpy during polymerization into the calculator to determine ceiling temperature.

## Ceiling Temperature Formula

The following equation is used to calculate the Ceiling Temperature.

Tc = ΔHp / ΔSp

• Where Tc is the ceiling temperature
• ΔHp is the change in enthalpy during polymerization
• ΔSp is the change in entropy during polymerization

To calculate a ceiling temperature, divide the change in enthalpy by the change in entropy during polymerization.

## What is a Ceiling Temperature?

Definition:

A ceiling temperature is defined as when the rate of polymerization and depolymerization are equal and it is a measure of the tendency of a polymer to revert to it’s constituent monomers.

## How to Calculate Ceiling Temperature?

Example Problem:

The following example outlines the steps and information needed to calculate Ceiling Temperature.

First, determine the change in enthalpy. In this example, the change in enthalpy is found to be 30.

Next, determine the change in entropy. In this case, the change in entropy is 20.

Finally, calculate the ceiling temperature using the formula above:

Tc = ΔHp / ΔSp

Tc = 50/20

Tc = 2.5