Question

Write answer to correct number of significant figures.

For each of the following sets of pressure/volume data, calculate the new volume of the gas sample after the pressure change is made. Assume that the temperature and the amount of gas remain the same. (a) V 101 mL at 704 mm Hg; V = 4.9 mL at 711 mmHg 217 mL at 1.02 atm; V = 40 (b) V mL at 0.953 atm (c) V 3.23L at 105 kPa; V = 40 L at 107 kPa

Answer 1

a)

Given:

Vi = 101 mL

Pi = 704 mmHg

Pf = 711 mmHg

use:

Pi*Vi = Pf*Vf

704 mmHg * 101 mL = 711 mmHg * Vf

Vf = 100. mL

Answer: 100. mL

b)

Given:

Vi = 217 mL

Pi = 1.02 atm

Pf = 0.953 atm

use:

Pi*Vi = Pf*Vf

1.02 atm * 217 mL = 0.953 atm * Vf

Vf = 232 mL

Answer: 232 mL

c)

Given:

Vi = 3.23 L

Pi = 105 kPa

Pf = 107 kPa

use:

Pi*Vi = Pf*Vf

105 kPa * 3.23 L = 107 kPa * Vf

Vf = 3.17 L

Answer: 3.17 L