Question

A 886- mL sample of Ne(g) is at 752 mm Hg and 25 ∘C . What will be the new volume if, with the pressure and amount of gas held constant, the temperature is

Lowered to -24 ∘C ?

Answer 1

740 mL

Step-by-step explanation:

Since pressure is being held constant, you need to use the Charles' Law formula to find the final volume:

V₁ / T₁ = V₂ / T₂

In this formula, "V₁" and "T₁" represent the initial volume and temperature. "V₂" and "T₂" represent the final volume and temperature. Since negative values cannot be used in the equation, you need to convert the temperatures from Celsius to Kelvin.

V₁ = 886 mL V₂ = ? mL

T₁ = 25°C + 273 = 298 K T₂ = -24°C + 273 = 249 K

V₁ / T₁ = V₂ / T₂ <----- Charles' Law formula

886 mL / 298 K = V₂ / 249 K <----- Insert values

2.973 = V₂ / 249 K <----- Simplify left side

740 = V₂ <----- Multiply both sides by 249