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kakasveta [241]
3 years ago
10

Under certain conditions the solid and liquid states of water can exist in equilibrium how are these conditions indicated on the

phase diagram for water
Chemistry
2 answers:
Juli2301 [7.4K]3 years ago
6 0

The phase diagram of water has following features

a) Triple point : this is the point of intersection of three curves and is the point where all the three phases of water exist together

The triple point of water is 273.16K, and 4.58 mm Hg

b) Curves : these represents the presence of two phases together

the curve is shared by any two phases

i) melting curve : shared between liquid and solid phase of water

ii) vapour curve : shared between liquid and gas phase

iii) sublimation curve: shared between solid and gas phase of water

c) area : these are the portions of a phase diagram which represent single phase of water : solid, liquid or gas

Thus answer is :

Curves are used to indicate that the solid and liquid states of water can exist in equilibrium

Serggg [28]3 years ago
3 0

in the phase diagram the line between solid and liquid is where both phases available at the same time

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A field worker is exposed to a xylene for a duration of 8 weeks at 40 hrs/wk. The concentration of xylene in the workplace is 40
Andrej [43]

Answer:

The chronic daily intake during the period of exposure is most nearly 0.012 mg/kg day.

Explanation:

Number of hours worker exposed to xylene = 40 hr/week\times 8 week = 320 hours

The concentration of xylene in the workplace =40 \mu g/m^3

The worker is inhaling air at a rate of 0.9 m^3/hr.

Amount xylene inhaled by worker in an hour :

= 40\mu g/m^3\times 0.9 m^3/hr=36 \mu g/hr

Amount xylene inhaled by worker in 320 hours:

36 \mu g/hr\times 320 hr=11,520 \mu g=11,520\times 0.001 mg=11.520 mg

1 μg = 0.001 mg

Amount xylene inhaled by worker in 320 hours = 11.520 mg

1 day = 24 hours

Amount xylene inhaled by worker in 1 day:

\frac{24}{320}\times 11.520 mg=0.864 mg

Assuming 70 kg body mass, the chronic daily intake of xylene :

\frac{0.864 mg/day}{70 kg}=0.01234 mg/ kg day\approx 0.012 mg/ kg day

The chronic daily intake during the period of exposure is most nearly 0.012 mg/kg day.

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