Question

A 20g chunk of dry ice is placed in an empty 0.75 litre wire bottle tightly closed what would be the final pressure in the bottle after all CO­2 has been evaporated and temperature reaches to 25°C?

Answer 1

Answer:

w = 20g dry CO2 which will evaporate to develop pressure  

m = 44, V = 0.75 litre, P = ? T = 298K  

PV = W / m RT  

P × 0.75 = 20 / 44 5  0.0821 × 298  

P = 14.228 atm  

Pressure inside the bottle = P + atm pressure  = 14.828 + 1 = 15.828 atm

Answer 2

Explanation:

w = 20 g dry CO2

which will evaporate to develop pressure.

m = 44, V = 0.75 L, P = ?, T = 298 K

P = w/m × RT (as PV = nRT & n = w/m)

P × 0.75 = 20/44 × 20/4450.0821 × 298.

P = 14.828 atm

Pressure inside the bottle = P + atm pressure.

= 14.828 + 1 = 15.828atm