What mass will 2.5 L of chlorine gas be at STP?

m = 7.7 g Cl2

Explanation: To find mass of chlorine gas we will first derive the ideal gas law formula and find first the number of moles of Cl2. At STP, Pressure is equal to 1 atm and temperature is 273 K.

n= PV /RT

= 1 atm ( 2.5 L) /0.0821 L.atm / mole.K ( 273 K)

= 0.11 mole Cl2

Convert moles of Cl2 to grams using the molar mass of Cl2 which is 70 g Cl2.

0.11 mole Cl2 x 70 g Cl2 / 1 mole Cl2

= 7.7 g Cl2

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.