Question

when using a manometer to check boyle's law, why is the pressure changed slowly? a. to avoid compressing the liquid b. to avoid compressing the gas c. to avoid changing the gas temperature d. to avoid changing the mass of the gas

Answer 1

Option C is correct.

c. to avoid changing the gas temperature

Step-by-step explanation:

Manometers are devices using columns of a suitable liquid to measure the difference in pressure between two points and the atmosphere. A manometer is required for measuring substantial gauge pressures. It is the modified form of the piezometric tube.

Answer 2

The device used to compare the pressure between two point and atmosphere is manometer. It uses liquid columns, where height is measured and pressure is determined from the relation

P = h x density X g

h = height of liquid

g = acceleration due to gravity

Now Boyle's law is that pressure is inversely proportional to volume, keeping moles of gas and temperature constant.

Thus a care is made during change in pressure (it is done slowly) so that the temperature may not vary, which else could affect he results.

Hence the correct answer is

to avoid changing the gas temperature