Concept explainers
Interpretation: The constant volume of the oxygen gas
Concept Introduction: The initial pressure of the gas at the varying temperatures can be calculated using Gay-Lussac’s law, which states the relationship between pressure and temperature of the gas
According to Gay-Lussac’s Law, for the gas held at constant volume, the pressure of a given amount of gas is directly proportional to the temperature of the gas. Mathematically, it is given as
We consider two different sets of temperature and pressure of the gas, the above equation becomes as follows:
Where
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Chapter 5 Solutions
Introduction to General, Organic and Biochemistry
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- Practice problem: A fixed volume of 5 L is holding 4 moles of gas at a pressure of 3 atm. If the quantity of gas is increased to 5 moles, what will be the new pressure? Practice Problem (You first need to determine which law to use). A 0.4 moles of gas with a volume of 2 L has a T of 413 K and a P of 7 atm. If we decrease the T to 325 K while holding the V constant, what is the new P?arrow_forwardShown here is a representation of a closed container in which you have just placed 10 L of H2O. In our experiment, we are going to call this starting point in time t = 0 and assume that all of the H2O is in the liquid phase. We have represented a few of the H2O molecules in the water as dots. a Consider a time t = 1, at which some time has passed but the system has not reached equilibrium. i. How will the level of the liquid H2O compare to that at t = 0? ii. How will the vapor pressure in the flask compare to that at t = 0? iii. How will the number of H2O molecules in the vapor state compare to that at t = 0? iv. How does the rate of evaporation in this system compare to the rate of condensation? v. Draw a picture of the system at t = 1. b Consider a time t = 2, at which enough time has passed for the system to reach equilibrium. i. How will the level of the liquid H2O compare to that at t = 1? ii. How will the vapor pressure in the flask compare to that at t = 1? iii. How will the number of H2O molecules in the vapor state compare to that a t = 1? iv. How does the rate of evaporation in this system compare to the rate of condensation? v. Draw a picture of the system at t = 2.arrow_forwardTOPIC: GAS LAWS Problem: If the pressure of gas at -73°C is doubled but the volume is held constant, what will its final temperature be in °C? Problem: The three main components of air are carbon dioxide, nitrogen and oxygen. In a sample containing a mixture of these gases (at STP) the partial pressure of carbon dioxide and nitrogen are given as 28.5 mmHg and 593.525 mmHg, respectively. What is the partial pressure of oxygen? Problem: A gas cylinder has an internal volume of 2,600L. If the sun heats the gas cylinder from a temperature of 20°C to 55°C, what will be the pressure inside the cylinder? Assume that initial pressure is at standard atmospheric pressure (760 mmHg). Problem: (Follow-up question): How many moles of gas is inside the cylinder in problem 4? (use R=0.08205 L-atm/mol-K)arrow_forward
- CHARLE'S LAW PROBLEM SOLVING 1.) Under constant pressure condition, a sample of hydrogen gas initially at 85°C and 7.2 L is cooled until its final volume is 4.1 L. What is the final temperature? 2.) Determine the change in volume if 60 ml of gas at 33°C is cooled to 15°C.arrow_forwardSelenium tetrafluoride, SeF4, is a colorless liquid. It has a vapor pressure of 757 mmHg at 105C and 522 mmHg at 95C. What is the heat of vaporization of selenium tetrafluoride?arrow_forwardWhat is the energy change when the temperature of 12.8 grams of gaseous neon is decreased from 39.3 °C to 24.7 °C ?Answer: Joules. Submit Answerarrow_forward
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