1. A 46.2-mL sample of gas in a cylinder is warmed from 27 ?C to 83 ?C.What is i

Question

1. A 46.2-mL sample of gas in a cylinder is warmed from 27 ?C to 83 ?C.What is its volume at the final temperature? (Assume constant pressure.)

2. The hydrogen gas formed in a chemical reaction is collected over water at 30.0 ?C at a total pressure of 730 mmHg .What is the partial pressure of the hydrogen gas collected in this way?If the total volume of gas collected is 724 mL , what mass of hydrogen gas is collected?

3. A piece of dry ice (solid carbon dioxide) with a mass of 29.5 g sublimes (converts from solid to gas) into a large balloon. Assuming that all of the carbon dioxide ends up in the balloon, what is the volume of the balloon at 26 ?C and a pressure of 737 mmHg ?

4. What is the density (in g/L) of hydrogen gas at 19.0 ?C and a pressure of 1670 psi ?

Explanation / Answer

1)
Given:
Vi = 46.2 mL
Ti = 27.0 oC
= (27.0+273) K
= 300 K
Tf = 83.0 oC
= (83.0+273) K
= 356 K

use:
Vi/Ti = Vf/Tf
46.2 mL / 300.0 K = Vf / 356.0 K
Vf = 54.824 mL
Answer: 54.8 mL

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