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 ] It depends on how much the pressure and temperature change Decreases Increases

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标准答案
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思路分析
Let's walk through each sub-question and evaluate the possible options step by step. a) If a balloon is cooled, what happens to the pressure of the air inside the balloon? - In the gas laws, cooling a gas at constant volume reduces the average kinetic energy, leading to fewer collisions with the container walls and thus lower pressure. Therefore, the option Decreases matches the expected behavior of an ideal gas (P ∝ T when volume is fixed). The alternative Increase would contradict the direct link between temperature and pressure in a sealed, constant-volume system. If one of the listed options suggested no change, that would ignore the temperature dependence of press......Login to view full explanation

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