# 1. A pipet delivers 1.03 g  of water at 18 oC . What volume (in mL) does the pipet deliver?Use the table in your lab manual to assist you with determining the density of water at a specific temperature.Answer: ____ mL2. Determine the boiling point of water at 658 mmHg .Answer: ____ degrees celsius

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1. A pipet delivers 1.03 g  of water at 18 oC . What volume (in mL) does the pipet deliver?
Use the table in your lab manual to assist you with determining the density of water at a specific temperature.
2. Determine the boiling point of water at 658 mmHg .
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Step 1

Density of a substance is the ratio of its mass and volume. It is expressed in equation (1) in which d is the density, m is the mass and V is the volume.

The expression for Clausius Clapeyron equation is expressed in equation (2) in which P1 and P2 are two different pressures, T1 and T2 are two different temperatures, ∆Hvap is the enthalpy of vaporization and R is the gas constant.

Step 2

(1)

The density of water at 18 degrees Celsius is 0.998595 g/mL and the mass of water is 1.03 g. Use the equation (1) to determine the volume of water as shown in equation (3) .

Step 3

(2)

The enthalpy of vaporization of water (∆Hvap ) is 40650 J/mol. Water boils at 373.15 K. Use the equation (2) to determine the boiling point of water and substitute 760 mmHg for P1, 658 mmHg for P2, 373.15 K for T...

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