Question

Calculate the pressure of 2.24 L of 10 g C2H4 gas
at 100°C.​

Answer 1

Answer :

Volume of ethene = 2.24L

Mass of ethene = 10g

Temperature = 100°C = 373K

We have to find pressure$.$

In order to find pressure, first we need to find number of moles of ethene.

Mole is defined as the ratio of mass of compound to the molar mass.

★ Molar mass of ethene :

➝ 2(C) + 4(H)

➝ 2(12) + 4(1)

➝ 24 + 4

➝ 28 g/mol

Moles of ethene :

➝ n = 10/28

➝ n = 0.36

Pressure can be calculated by using ideal vas equation. PV = nRT

• P denotes pressure
• V denotes volume
• n denotes number of moles
• R denotes gas constant
• T denotes temperature

➠ PV = nRT

➠ P × 2.24 = 0.38 × 0.082 × 373

➠ P = 11.62/2.24

➠ P = 5.18 atm