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4 April, 17:55

The Kelvin temperature of a sample of 678 cm3 ammonia gas is doubled, what is

the new volume?

+2
Answers (1)
  1. 4 April, 18:09
    0
    The new pressure will be

    1000 L

    , rounded to one significant figure.

    Explanation:

    Boyle's law states that when a gas is held at a constant temperature and mass in a closed container, the volume and pressure vary inversely. The equation to use is

    P

    1

    V

    1

    =

    P

    2

    V

    2

    .

    Given

    V

    1

    =

    200

    mL

    *

    1

    L

    1000

    mL

    =

    0.2 L

    P

    1

    =

    700 mmHg

    V

    2

    =

    100

    mL

    *

    1

    L

    1000

    mL

    =

    0.1 L

    Unknown

    P

    2

    Equation

    P

    1

    V

    1

    =

    P

    2

    V

    2

    Solution

    Rearrange the equation to isolate

    P

    2

    and solve.

    P

    2

    =

    P

    1

    V

    1

    V

    2

    P

    2

    =

    (

    700

    mmHg

    *

    0.2

    L

    )

    0.1

    L

    =

    1400 L

    , which must be rounded to

    1000 L

    because all of the measurements have only one significant figure.

    Answer link
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