why is temperature of H2O2 measured in the graduated cylinder?

It would help if we knew what you were doing. Are you building a rocket ship? Dissolving blood with H2O2? Cleansing an open wound with H2O2? Washing the floor with it? Just what? As the question stands, I don't have the foggiest.

decomposition of H2O2 to water and O2

As the temperature increases the decomposition increases. Another way of saying it is that the rate of decomposition increases with increasing T.

The temperature of H2O2 (hydrogen peroxide) can be measured in a graduated cylinder because it is a commonly available tool in laboratories and has certain advantages for this purpose.

Here's how you can measure the temperature of H2O2 using a graduated cylinder:

1. First, ensure that your graduated cylinder is clean and dry. Any residue or water droplets from previous experiments may affect the accuracy of your measurement.

2. Pour a sufficient amount of H2O2 into the graduated cylinder. The volume should be enough to fully immerse the thermometer or temperature probe you will be using.

3. Carefully insert a laboratory thermometer or temperature probe into the H2O2, ensuring that it is completely submerged and not touching the sides or bottom of the cylinder. If you are using a digital temperature probe, follow the manufacturer's instructions for proper usage.

4. Allow the H2O2 to equilibrate with the surrounding environment for a few minutes. This ensures that the temperature of the liquid reaches the same level as the surroundings.

5. Observe the reading on the thermometer or the digital display of the temperature probe. This will give you the temperature of the H2O2 in the graduated cylinder.

Measuring the temperature of H2O2 is important because it can provide insights into the reaction kinetics and properties of the substance. Temperature affects the rate of chemical reactions, so having an accurate measurement can help determine the optimal conditions for a specific reaction or provide valuable data for scientific analysis.

Using a graduated cylinder for this purpose is convenient since it is a volumetric measuring device commonly found in laboratories. Graduated cylinders are designed to accurately measure volumes of liquids and are typically marked with volumetric graduations that allow for precise readings.

It is worth noting that when working with certain hazardous or reactive substances, additional precautions and specialized equipment may be necessary to measure temperature accurately and safely. Always follow proper safety protocols and refer to specific experimental procedures if available.