Question

b. A gas is allowed to expand at a constant temperature from an initial volume of 400 ml to
a final volume of 2000 ml . At the end of the expansion the pressure of the
pressure of the gas was found
to be 1 atmosphere.what was the initial pressure of the gas
​

Answer 1

Answer:

Answer

Since the temperature remains constant, Boyle's law is applicable

This means that:

P

1

V

1

=P

2

V

2

Here, P

1

=??

V

1

=400 mL

P

2

=100 mm

V

2

=1000 mL

Putting all the values, we get

P

1

×400=100×1000

P

1

=250 mm

Hence, the correct option is C

Answer 2

Answer:

5

Explanation:

p1= p2 multiply by v2/v1

1 multiply by 2000/400

so p1= 5