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A gas is compressed. The measured volume and absolute pressure before compression

are 0.30m3
and 50.7kPa, respectively. After compression the volume and the pressure
becomes 0.111m3
and 202.8kPa, respectively. What is the compressibility and bulk
modulus of elasticity of this gas?

User LuBre
by
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1 Answer

4 votes

Answer:

To determine the compressibility and bulk modulus of elasticity of a gas, we can use the following formulas:

Compressibility:

β = - (1/V) * (∆V/∆P)

where V is the initial volume of the gas, ∆V is the change in volume, and ∆P is the change in pressure.

Bulk modulus of elasticity:

B = - V * (∆P/∆V)

where V is the initial volume of the gas, ∆V is the change in volume, and ∆P is the change in pressure.

Using the given values, we can calculate the compressibility as follows:

∆V = V2 - V1 = 0.111m3 - 0.30m3 = -0.189m3

∆P = P2 - P1 = 202.8kPa - 50.7kPa = 152.1kPa

Therefore,

β = - (1/0.30m3) * (-0.189m3/152.1kPa) ≈ 0.0048 kPa^-1

Similarly, we can calculate the bulk modulus of elasticity as follows:

B = - 0.30m3 * (152.1kPa/-0.189m3) ≈ 2418 kPa

Therefore, the compressibility of the gas is approximately 0.0048 kPa^-1, and the bulk modulus of elasticity is approximately 2418 kPa.

Step-by-step explanation:

User Cato Minor
by
8.6k points