Question

A 250-mL glass bottle was filled with 242mL of water at 20°C and tightly capped. it was then left outdoor overnight, where the average temperature was -5°C. predict what would happen. the density of water at 20°C is 0.998g/cm^3 and that of ice at -5°C is 0.916g/cm^3.

Answer 1

The glass bottle will get crack.

Step-by-step explanation:

Volume of the glass bottles,V = 250 mL

Density of water at 20°C =
`0.998g/cm^3`

Mass of water in bottle = M

Volume of water at 20°C ,V' = 250 mL (
`1cm^3= 1 mL`)

V>V'

`Density=0.988 g/cm^3=(M)/(242 cm^3)`

M = 239.096 g

Since mass remains constant, the mass of liquid water will be equal to mass of water when freezes

Density of ice at -5°C =
`0.916g/cm^3`

Volume of the ice at -5°C= V''

`Density=0.916 g/cm^3=(239.096g)/(V')`

`V''=261.0218cm^3=261.0218 mL`

V''>V>V'

As we can see that volume of water has expanded on freezing and exceeded the volume of the glass bottle. This expansion will result in breaking or cracking of a glass bottle.