Comparison of soap bubbles filled with hydrogen gas versus a mixture of oxygen and hydrogen скачать в хорошем качестве

Comparison of soap bubbles filled with hydrogen gas versus a mixture of oxygen and hydrogen

In this demonstration, we have one example of soap bubbles filled with hydrogen, and another example where the soap bubbles are filled with a mixture of hydrogen and oxygen. We are using soap bubbles to contain the gases and limit their diffusion. Using fire to pop the bubbles filled with hydrogen gas makes it possible for hydrogen to react with oxygen in air (air is ~20% oxygen). This process is not very fast, as hydrogen needs time to mix with air to react after the soap bubbles are popped. Igniting the soap bubbles filled with a mixture of hydrogen and oxygen results in a supersonic detonation. In this case, the two reactants are pre-mixed (also we are using pure O2), and the reaction occurs even faster. This demonstration shows that spontaneity of a reaction implies nothing about speed, and other factors must be considered. This demonstration also shows how mixing of the reagents can influence the rate at which the reaction proceeds.