Question

The volume of 350. mL of gas at 25°C is decreased to 155 mL at constant pressure. What is the final temperature of the gas?

Answer 1

Answer:

The final temperature of the gas is 132.04 K .

Explanation:

At constant pressure and number of moles, using Charles's law  

$\frac {V_1}{T_1}=\frac {V_2}{T_2}$

Given ,  

V₁ = 350 mL  

V₂ = 155 mL

T₁ = 25 °C

T₂ = ?

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15  

So,  

T₁ = (25 + 273.15) K = 29815 K  

Using above equation as:

$\frac{350}{298.15}=\frac{155}{T_2}$

$T_2=\frac{155\cdot \:298.15}{350}\ K$

The final temperature of the gas is 132.04 K .