题目
题目

Chemistry - Winchel: 24-25_YR U8: Combined Gas Laws

多重下拉选择题

What will happen if the following changes are made?  a) If a balloon is cooled, what happens to the pressure of the air inside the balloon? [ Select ] Increases Decreases b) What happens to the pressure of the air in a car tire on a very hot day? Increases c) What happens to the volume of a hot air balloon when the heater is turned on?  [ Select ] Increases Decreases d) What will happen to the pressure inside a can of hair spray if it is thrown into the fire?  [ Select ] Increases Decreases e) What happens to the volume of a weather balloon if the pressure and temperature both decreases? [ Select ] Increases It depends on how much the pressure and temperature change Decreases

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标准答案
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思路分析
We begin by restating each sub-question and the corresponding answer choice. a) If a balloon is cooled, what happens to the pressure of the air inside the balloon? Options: Increases / Decreases. Correct answer: Decreases. - Reason: For a gas in a fixed amount (n) at a given temperature, pressure is related to temperature and volume via the ideal gas law. Cooling lowers the average kinetic energy of the gas molecules, reducing collisions with the balloon walls, so the pressure tends to drop. If the balloon’s volume can change (and it usually can for a flexible balloon), the reduced temperature generally leads to reduced pressure, not a......Login to view full explanation

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