Question

a certain volume of gas is kept at 77degrescelsius when temperature is decreased by 20degree celsius the gas occupies a volum eof 900ml, find initilal volume of gas(pressure constant)

Answer 1

Given

• Final volume of the gas (V₂) = 900 ml
• Initial temperature of the gas (T₁) = 77°C
• Final temperature of the gas (T₂) = 77°C - 20°C

To find

• Initial volume of the gas (V₁)

☯ CHARLES LAW

• V₁/T₁ = V₂/T₂

Solution

☯ Convert °C to K :

• T₁ = 273 + 77°C
• T₁ = 350 K
• T₂ = 273 + (77°C - 20°C) (Given in question)
• T₂ = 330K
• V₁ = x
• V₂ = 900

Calculation

• x ÷ 350 = 900 ÷ 330
• x = ³⁵⁰⁄₃₃₀ × 900
• x = ³⁵⁄₃₃ × 900
• x = 954.4

☯ Initial volume of the gas is 954.4 ml

Learn more

• Boyles law : P₁ × V₁  = P₂ × V₂
• Gas equation : P₁ V₁/T₁ = P₂ V₂/T₂
• https://brainly.in/question/34795223

Answer 2

x ÷ 350 = 900 ÷ 330

x = ³⁵⁰⁄₃₃₀ × 900

x = ³⁵⁄₃₃ × 900

x = 954.4

☯ Initial volume of the gas is 954.4 ml