Question

300 ml of a gas at 27°C is cooled to -3°C at constant pressure, the final volume is
a) 540 ml
b) 135 ml
c) 270 ml
d) 350 ml

need steps please​

Answer 1

Given :

➳ Initial volume of gas = 300ml

➳ Initial temperature = 27°C

➳ Final temperature = -3°C

To Find :

⟶ Final volume of gas.

SoluTion :

⇒ This question is completely based on the concept of charles' law.

⇒ As per this law, Pressure remaining constant, the volume of a fixed mass of a gas is directly proportional to its absolute temperature.

Mathematically, $\bf{V\propto T}$

✴ Conversion :

➻ 0°C = 273K

➻ 27°C = 27 + 273 = 300K

➻ -3°C = -3 + 273 = 270K

$\leadsto\sf\:\dfrac{V}{V'}=\dfrac{T}{T'}$

$\leadsto\sf\:\dfrac{300}{V'}=\dfrac{300}{270}$

$\leadsto\sf\:V'=\dfrac{300\times 270}{300}$

$\leadsto\boxed{\bf{V'=270ml}}$

Answer 2

Hieee...

300 ml of a gas at 27°C is cooled to -3°C at constant pressure, the final volume is

• 540ml
• 135ml
• 270ml ✔️✔️
• 350ml