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ChemistryQ&A Library1. 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 celsiusQuestion

Asked Sep 20, 2019

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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.

Answer: ____ mL

2. Determine the boiling point of water at 658 mmHg .

Answer: ____ degrees celsius

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 P_{1} and P_{2} are two different pressures, T_{1} and T_{2} are two different temperatures, ∆H_{vap} 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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