Chapter 5: Problem 11
If you release a helium balloon, it soars upward and eventually pops. Explain this behavior
Chapter 5: Problem 11
If you release a helium balloon, it soars upward and eventually pops. Explain this behavior
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Get started for freeA bicycle tire is filled with air to a pressure of 75 psi at a temperature of \(19^{\circ} \mathrm{C}\) . Riding the bike on asphalt on a hot day increases the temperature of the tire to \(58^{\circ} \mathrm{C}\) . The volume of the tire increases by 4.0\(\%\) . What is the new pressure in the bicycle tire?
An ideal gas at \(7^{\circ} \mathrm{C}\) is in a spherical flexible container having a radius of 1.00 \(\mathrm{cm} .\) The gas is heated at constant pressure to \(88^{\circ} \mathrm{C}\) . Determine the radius of the spherical container after the gas is heated. [Volume of a sphere \(=(4 / 3) \pi r^{3} \cdot ]\)
A mixture of chromium and zinc weighing 0.362 g was reacted with an excess of hydrochloric acid. After all the metals in the mixture reacted, 225 mL dry of hydrogen gas was collected at \(27^{\circ} \mathrm{C}\) and \(750 .\) torr. Determine the mass percent of \(\mathrm{Zn}\) in the metal sample [Zinc reacts with hydrochloric acid to produce zinc chloride and hydrogen gas; chromium reacts with hydrochloric acid to produce chromium (III) chloride and hydrogen gas. \(]\)
The nitrogen content of organic compounds can be determined by the Dumas method. The compound in question is first reacted by passage over hot \(\mathrm{CuO}(\mathrm{s})\): $${\text { Compound }} \frac{\text { Hot }}{\text { \(\mathrm{CuO}(\mathrm{s})\) }} \mathrm{N}_{2}(g)+\mathrm{CO}_{2}(g)+\mathrm{H}_{2} \mathrm{O}(g)$$ The product gas is then passed through a concentrated solution of \(\mathrm{KOH}\) to remove the \(\mathrm{CO}_{2} .\) After passage through the \(\mathrm{KOH}\) solution, the gas contains \(\mathrm{N}_{2}\) and is saturated with water vapor. In a given experiment a 0.253 -g sample of a compound produced 31.8 \(\mathrm{mL} \mathrm{N}_{2}\) saturated with water vapor at \(25^{\circ} \mathrm{C}\) and 726 torr. What is the mass percent of nitrogen in the compound? (The vapor pressure of water at \(25^{\circ} \mathrm{C}\) is 23.8 torr.
Calculate the average kinetic energies of \(\mathrm{CH}_{4}(g)\) and \(\mathrm{N}_{2}(g)\) molecules at 273 \(\mathrm{K}\) and 546 \(\mathrm{K} .\)
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