All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds
Problem

A Kongming lantern, or Chinese sky lantern, is a small hot air balloon. At room temperature (25 °C), these have a volume of roughly 6.7 liters. After the fire is lit at the bottom, assume all the gas inside reaches a final temperature of 87 °C, what is the final volume of the balloon?

A. 1.9 L 

B. 23 L 

C. 8.1 L 

D. 5.5 L 

E. 150 L

Solution

We are asked to calculate the final volume of the gas at  87 °C.


Recall that the ideal gas law is:


PV=nRT


The temperature and volume of a gas are related to the number of moles, gas constant and pressureThe value nR and P is constant


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