![]() At some point, the pressure is high enough to lift the lid, and the excess gas is released, the pressure is leveled, and the whole process starts over again and again. Lid on a saucepan – At first, it may look pretty obvious, but why does the cover repeatedly jump and rattle around while you are heating your meals in a pot? Increasing the temperature results in higher pressure of the gas (mainly water vapor) inside the saucepan. Tire pressure in different seasons – Have you ever inflated a tire during winter, only for it to be overinflated when the weather got warmer? Or, inversely, when it was filled during summer, did the pressure decrease when it cooled down? In this case, tires are an example of a closed system, so the higher the temperature, the higher the pressure. However, in such computational problems, the outcome is actually a really good approximation, so as long as we don't put our gas into some extremal conditions (pressure or temperature), these results can be used.Īre you interested in learning more about pressure? Check out our pressure calculator.Ĭan we actually see how Gay-Lussac's law works in our daily life? Take a look at these examples: We have to be aware that both problems are examples of real gases, whereas all of the formulas are only 100% accurate for ideal ones. Just a small remark concerning the results. The answer is relatively easy – just apply Gay-Lussac's law: After some time it is cooled down to the point where the pressure drops to 1 atm. ![]() In this example, we have a rigid box filled with nitrogen, and we know that it is heated to 460 K while the internal pressure is equal to 1.6 atm. You can always check the answer with our Gay-Lussac's law calculator, or simply use it to save time!Ģ. We can also evaluate the amount of gas in moles using the information provided to us in the question: The next step is to rearrange Gay-Lussac's law formula to estimate the final pressure: To start, we need to convert the temperatures into the absolute scale, Kelvin, which is necessary for Gay-Lussac's law: Assuming that the can isn't leaking, what is the final value of the pressure inside? Then we heat our container so that the temperature reaches 400☌. Let's say we have a metal can containing 300 ml of air in a 20☌ room, and the initial pressure of the gas is 100 kPa (we can also write 10⁵ Pa using scientific notation). How about we move on to solve some computational problems?ġ.
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