Textbook Question
Identify each of the following changes of state as melting, freezing, sublimation, or deposition:
c. Heat is removed from 125 g of liquid water at 0 °C.
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Ch.3 Matter and Energy
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249
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Table of contents
- Ch.1 Chemistry in Our Lives19
- Ch.2 Chemistry and Measurements80
- Ch.3 Matter and Energy53
- Ch.4 Atoms and Elements58
- Ch.5 Nuclear Chemistry42
- Ch.6 Ionic and Molecular Compounds57
- Ch.7 Chemical Quantities and Reactions38
- Ch.8 Gases30
- Ch.9 Solutions50
- Ch.10 Acids and Bases and Equilibrium64
- Ch.11 Introduction to Organic Chemistry: Hydrocarbons77
- Ch.12 Alcohols, Thiols, Ethers, Aldehydes, and Ketones82
- Ch.13 Carbohydrates54
- Ch.14 Carboxylic Acids, Esters, Amines, and Amides91
- Ch.15 Lipids61
- Ch.16 Amino Acids, Proteins, and Enzymes84
- Ch.17 Nucleic Acids and Protein Synthesis86
- Ch.18 Metabolic Pathways and ATP Production73
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249Not the one you use?Change textbook
Chapter 3, Problem 43
A patient receives 3.2 L of intravenous (IV) glucose solution. If 100. mL of the solution contains 5.0 g of glucose (carbohydrate), how many kilocalories did the patient obtain from the glucose solution?
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Step 1: Determine the total volume of the glucose solution in milliliters. Since the patient receives 3.2 L, convert this to milliliters using the conversion factor 1 L = 1000 mL. The total volume is 3.2 × 1000 = 3200 mL.
Step 2: Calculate the total mass of glucose in the solution. Use the given ratio that 100 mL of solution contains 5.0 g of glucose. Set up a proportion: (5.0 g / 100 mL) = (x g / 3200 mL). Solve for x to find the total mass of glucose.
Step 3: Determine the energy content of glucose. Recall that glucose provides 4 kilocalories (kcal) per gram. Multiply the total mass of glucose obtained in Step 2 by 4 kcal/g to calculate the total energy in kilocalories.
Step 4: Ensure unit consistency and verify calculations. Check that all units (mL, g, kcal) are correctly converted and consistent throughout the problem.
Step 5: Interpret the result. The final value represents the total kilocalories the patient obtained from the glucose solution, which is useful for understanding the energy provided by the IV solution.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Caloric Content of Carbohydrates
Carbohydrates provide energy, with each gram yielding approximately 4 kilocalories. Understanding this conversion is essential for calculating the total energy provided by glucose in the IV solution.
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Classification of Carbohydrates Example 1
Volume to Mass Conversion
To determine the total amount of glucose in the IV solution, one must convert the volume of the solution (in liters) to mass (in grams). This involves knowing the concentration of glucose in the solution, which is given in grams per 100 mL.
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02:10Conversion Factors (Simplified) Concept 2
Unit Conversion
In this context, converting between milliliters and liters, as well as grams to kilocalories, is crucial. Proper unit conversion ensures accurate calculations and understanding of the total caloric intake from the glucose solution.
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01:56Conversion Factors (Simplified) Concept 1
Related Practice
Textbook Question
Identify each of the following changes of state as melting, freezing, sublimation, or deposition:
a. Dry ice in an ice-cream cart disappears.
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Textbook Question
Using the energy values for foods (see Table 3.8), determine each of the following (round off the answer for each food type to the tens place): d. the grams of fat in one avocado that has 410 kcal, 13 g of carbohydrate, and 5 g of protein
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Textbook Question
Using the energy values for foods (see TABLE 3.7), determine each of the following (round off the answer for each food type to the tens place):
a. the total kilojoules in two tablespoons of crunchy peanut butter that contains 6 g of carbohydrate, 16 g of fat, and 7 g of protein
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Textbook Question
For dinner, Charles had one cup of clam chowder, which contains 16 g of carbohydrate, 12 g of fat, and 9 g of protein. How much energy, in kilocalories and kilojoules, is in the clam chowder? (Round off the answer for each food type to the tens place.)
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Textbook Question
Identify each of the following changes of state as melting, freezing, sublimation, or deposition:
b. Snow on the ground turns to liquid water.
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