Question

N2 is found in a litre flask under 100 kPa pressure and O2 is found in another 3
litre flask under 320 kPa pressure. If the two flasks are connected, the resultant
pressure is
(a) 310 kPa
(b) 210 kPa
(c) 420kPa
(d) 365 kPa
(e) 265 kPa​

Answer 1

Answer:

(e) 265 kPa​

Explanation:

Using Boyle's law  

${P_1}\times {V_1}+{P_2}\times {V_2}={P}\times {V}$

Given ,  

For, $N_2$

V₁ = 1 L

P₁ = 100 kPa

For, $O_2$

V₂ = 3 L

P₂ = 320 kPa

V = 1 + 3 L = 4 L

Using above equation as:

${100}\times {1}+{320}\times {3}={P}\times {4}$

$100+960={P}\times {4}$

${P}\times {4}=1060$

Pressure = 265 kPa