According to Charles law, we know, at constant pressure, volume is directly proportional to temperature.
So, V/T = constant
V₁/t₁ = V₂/t₂
V₁t₂ = V₂t₁
Here, we have: V₁ = 1.50 L
V₂ = 0.40 L
T₂ = 77.2 K
T₁ = ?
Substitute their values into the expression:
1.50 × 77.2 = 0.40 × T₁
T₁ = 115.8 / 0.40
T₁ = 289.5
After rounding-off to unit place value, it would be equal to 290 K
So, In short Option D would be your correct answer.
Hope this helps!
