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Needhelpp101

  • one year ago

If measurements of a gas are 50L and 300 kilopascals and then the gas is measured a second time and found to be 75L, describe what had to happen to the pressure (if temperature remained constant). Include which law supports this observation.

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  1. Needhelpp101
    • one year ago
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    @LaurenRoberts

  2. anonymous
    • one year ago
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    Calculate the new pressure with P1V1 = P2V2 The pressure had to decrease if the volume increased. See Boyle's Law

  3. anonymous
    • one year ago
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    volume goes up, pressure goes up too

  4. anonymous
    • one year ago
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    If the volume increased, the other value will increase too.

  5. Jaynator495
    • one year ago
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    Explosive Diarrhea x100

  6. Needhelpp101
    • one year ago
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    HAHA @Jaynator495 OMG >.<

  7. Needhelpp101
    • one year ago
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    @LaurenRoberts Pressure had to decrease in order for the volume to increase. The important thing to notice here is that temperature is being kept constant. Assuming that the amount of gas you have remains constant as well, i.e. you don't add or remove gas from the container, then you can use the ideal gas law equation to write P1⋅V1=n⋅R⋅T → for the first measurement P2⋅V2=n⋅R⋅T → for the second measurement If you replace the product n⋅R⋅T, which will be constant, in one of these two equations you'll get P1⋅V1=P2⋅V2 This is the mathematical expression for Boyle's Law, which states that pressure and volume have an inverse relationship when temperature and number of moles (amount of gas) are key constant. An inverse relationship means that if one increases, the other must decrease and vice versa. Even before doing any calculations, you can use Boyle's Law to predict what will happen to the pressure. If volume increased from 50 to 75 L, then the pressure mush have decreased proportionally. You can confirm this by P2=V1V2⋅P2 P2=50L75L⋅300 kPa=200 kPa The pressure indeed decreased, which corresponds to the increase in volume. So, as a conclusion, when the temperature of the gas is constant, i.e. the average kinetic energy of the gas molecules remains unchanged, the volume the gas occupies can only increase if pressure decreases. Likewise, the pressure of the gas can only decrease if the volume of the gas is increased.

  8. Jaynator495
    • one year ago
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    I normally dont come in math, but when i do... it tends to be for random reasons >_>

  9. Needhelpp101
    • one year ago
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    hehe

  10. Jaynator495
    • one year ago
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    I normally dont come in math, but when i do... it tends to be for random reasons >_>

  11. JTfan2000
    • one year ago
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    Charles law - volume/temp both increase because they are related

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