Concept explainers
(a)
Interpretation:
The amount of energy required to heat 150 g of water from
Concept Introduction:
The heat required to raise the temperature of a substance can be calculated as follows:
Here, m is mass, c is specific heat capacity and
The heat of vaporization is the amount of heat required to convert the substance from liquid to gas.
(b)
Interpretation:
The amount of energy released to condense 42 g of steam to water at
Concept Introduction:
The heat required to raise the temperature of a substance can be calculated as follows:
Here, m is mass, c is specific heat capacity and
The heat of fusion is the amount of heat generated to convert the substance from liquid to solid.
Want to see the full answer?
Check out a sample textbook solutionChapter 7 Solutions
General, Organic, and Biological Chemistry - 4th edition
- The enthalpy of vaporization of water is larger than its enthalpy of fusion. Explain why.arrow_forward5-86 Using the phase diagram of water (Figure 5-20), describe the process by which you can sublime 1 g of ice at-10°C and at 1 atm pressure to water vapor at the same temperature.arrow_forwardLiquid butane, C4H10, is stored in cylinders to be used as a fuel. Suppose 35.5 g of butane gas is removed from a cylinder. How much heat must be provided to vaporize this much gas? The heat of vaporization of butane is 21.3 kJ/mol.arrow_forward
- he enthalpy (H)of vaporization of water is about seven times larger than water’s enthalpy fusion(41kJ/molvs.6kJ/mol). What does this tell us about the relative similarities among the solid, liquid, and gaseous states of water?arrow_forwardA quantity of ice at 0C is added to 64.3 g of water in a glass at 55C. After the ice melted, the temperature of the water in the glass was 15C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(g C).arrow_forwardShown here is a curve of the distribution of kinetic energies of the molecules in a liquid at an arbitrary temperature T. The lines marked A, B, and C represent the point where each of the molecules for three different liquids (liquid A, liquid B, and liquid C) has the minimum kinetic energy to escape into the gas phase (see Figure 11.5 for more information). Write a brief explanation for each of your answers to the following questions. a Which of the moleculesA, B, or Cwould have the majority of the molecules in the gas phase at temperature T? b Which of the moleculesA, B, or Chas the strongest intermolecular attractions? c Which of the molecules would have the lowest vapor pressure at temperature T?arrow_forward
- The amount of heat required to melt 2 lbs of ice is twice the amount of heat required to melt 1 lb of ice. Is this observation a macroscopic or microscopic description of chemical behavior? Explain your answer.arrow_forwardIn each of the following groups of substances, pick the one that has the given property. Justify your answer. a. highest boiling point: HBr, Kr, or Cl2 b. highest freezing point: H2O, NaCl, or HF c. lowest vapor pressure at 25C: Cl2, Br2, or I2 d. lowest freezing point: N2, CO, or CO2 e. lowest boiling point: CH4, CH3CH3, or CH3CH2CH3 f. highest boiling point: HF, HCl, or HBr g.arrow_forwardWhat is U when 1.00 mol of liquid water vaporizes at 100C? The heat of vaporization, Hvap, of water at 100C is 40.66 kJ/mol.arrow_forward
- If you get boiling water at 100 C on your skin, it burns. If you get 100 C steam on your skin, it burns much more severely. Explain why this is so.arrow_forwardWill a closed container of water at 70 C or an open container of water at the same temperature cool faster on a cold winter day? Explain why.arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage LearningGeneral Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning
- Introductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage Learning