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Home Concept Builders Gases and Gas Laws Pressure and Temperature Help Help 7

Pressure and Temperature - Questions 7 Help

The pressure of a sample of gas is dependent upon the Kelvin temperature of the gas. Increasing the Kelvin temperature increases the pressure. The two quantities are directly proportional to one another. The ratio of Pressure/Temperature remains constant. As such, a doubling of the Kelvin temperature will double the pressure of the gas.

There are two questions in this Question Group. Each question is very similar to one another. The question below is one of the questions.
 

Version 1:
Observe the data table shown at the right for a sample of gas that has a constant volume and number of particles. Use the data table predict the pressure of the gas when it's temperature is 1000 K.
 
Pressure at 1000 K: ___________

In this question, you need to analyze a set of data to determine the pressure when the temperature is 1000 K. One way to do that is to use proportional reasoning. We'll explain that in a moment. But first, take some time to study (and/or scan) the graphic in order to gain familiarity with the pressure-temperature relationship. Then continue to the text that continues below the graphic.

Reasoning Proportionally with Pressure and Temperature

The temperature of 1000K is two times the temperature of 500 K. And since a doubling of the Kelvin temperature leads to a doubling of the pressure, we should be able to use this two times factor to find the answer. Trial 2 of the table has a temperature of 500 K. So the pressure at 1000 K will be two times the pressure of Trial 2. So your answer can quickly be found by doubling the pressure at 500 K.

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