
Concept explainers
You may have noticed that when water boils, you can seebubbles that rise to the surface of the water. What is inside these bubbles? Explain.
a. air
b. hydrogen and oxygen gas
c. oxygen gas
d. water vapor
e. carbon dioxide gas

Interpretation:The true optionfor the molecules which are present inside the boiling water bubbles is to be predicted.
Concept Introduction: Any liquid when heated, vaporizes at the temperaturestated as its boiling point and the process is referred as boiling. There occurs formation of bubbles when substances particularly liquids undergo boiling. The phase corresponding to the liquid also changes to vapor during boiling process.
Answer to Problem 1DQ
Correct answer: Option (d) that is water vapor.
Explanation of Solution
Reason for true statements: Option (d) the bubbles consists of water vapor.
When water boils, bubble formation occurs. On prolonged heating, the water molecules transform from liquid to gaseous state by gaining sufficient energy through heat. This is the boiling state of water where the boiling water bubble are composed of water vapor.
The reason is that on heating water, its bottom part directly interacts with the water source. This is the hottest surface and here the temperature can rise above water’s boiling temperature. In this way some liquid water gets converted to water vapor thus forming an expanded bubble made of water vapor.
Reason for false statements: Options (a), (b), (c) and (e) are false statements.
Bubbles formed at the initial stage of water boiling are air bubbles which form by the dissolved gases in the solution particularly oxygen as well as carbon dioxide.
Thus, boiling water bubbles comprises of water vapor.
Want to see more full solutions like this?
Chapter 2 Solutions
Chemical Principles
- A mixture of C7H12O2, C9H9OCl, biphenyl and acetone was put together in a gas chromatography tube. Please decide from the GC resutls which correspond to the peak for C7,C9 and biphenyl and explain the reasoning based on GC results. Eliminate unnecessary peaks from Gas Chromatography results.arrow_forwardIs the molecule chiral, meso, or achiral? CI .CH3 H₂C CIarrow_forwardPLEASE HELP ! URGENT!arrow_forward
- Identify priority of the substituents: CH3arrow_forwardHow many chiral carbons are in the molecule? OH F CI Brarrow_forwardA mixture of three compounds Phen-A, Acet-B and Rin-C was analyzed using TLC with 1:9 ethanol: hexane as the mobile phase. The TLC plate showed three spots of R, 0.1 and 0.2 and 0.3. Which of the three compounds (Phen-A; Acet-B or Rin-C) would have the highest (Blank 1), middle (Blank 2) and lowest (Blank 3) spot respectively? 0 CH: 0 CH, 0 H.C OH H.CN OH Acet-B Rin-C phen-A A A <arrow_forward
- Chemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub CoWorld of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage Learning
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage Learning




