Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 18, Problem 44SP
Air at 30 °C and 90 percent relative humidity is drawn into an air conditioning unit and cooled to 20 °C. The relative humidity is simultaneously reduced to 50 percent. How many grams of water are removed from a cubic meter of air at 30 °C by the air conditioner? Saturated air contains 30.4
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
The air temperature above coastal areas is profoundly influenced by the large specific heat of water. One reason is that the energy released when 1 cubic meter of water cools by 1.0°C will raise the temperature of an enormously larger volume of air by 1.0°C. Estimate that volume of air. The specific heat of air is approximately 1.0 kJ/kg ? °C. Take the density of air to be 1.3 kg/m3.
Approximately how long should it take 8.8 kg of ice at 0°C to melt when it is placed in a carefully sealed Styrofoam ice chest of dimensions 25 cm x 35 cm x 55 cm whose walls are 1.4 cm
thick? Assume that the conductivity of Styrofoam is double that of air and that the outside temperature is 34 °C.
Express your answer to two significant figures and include the appropriate units.
t =
μА
Value
Units
?
When air is inhaled, it quickly becomes saturated with water vapor as it passes through the moist upper airways. When a person breathes dry air, about 25 mg of water are exhaled with each breath. At 12 breaths/min, what is the rate of energy loss due to evaporation? Express your answer in both watts and Calories per day. At body temperature, the heat of vaporization ofwater is Lv = 24 × 105 J/kg.
Chapter 18 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 18 - 18.19 [I] Victoria Falls on the Zambezi River is...Ch. 18 - Prob. 20SPCh. 18 - 21. How much energy must be removed from a 10.0-kg...Ch. 18 - 22. A 100-kg chunk of ice at −150 °C is to have...Ch. 18 - Prob. 23SPCh. 18 - 24. A molten 50.0-kg quantity of gold at 1063 °C...Ch. 18 - Prob. 25SPCh. 18 - Prob. 26SPCh. 18 - Prob. 27SPCh. 18 - 18.28 [II] What will be the final temperature if...
Ch. 18 - Prob. 29SPCh. 18 - 18.30 [II] How long does it take a 2.50-W heater...Ch. 18 - 18.31 [II] A 55-g copper calorimeter contains 250...Ch. 18 - Prob. 32SPCh. 18 - 18.33 [II] How much heat is required to change 10...Ch. 18 - 18.34 [II] Ten kilograms of steam at 100 °C is...Ch. 18 - 18.35 [II] The heat of combustion of ethane gas is...Ch. 18 - Prob. 36SPCh. 18 - 18.37 [II] Determine the result when 100 g of...Ch. 18 - 18.38 [II] Determine the result when 10 g of steam...Ch. 18 - Prob. 39SPCh. 18 - 18.40 [II] How long will it take a 500-W heater to...Ch. 18 - Prob. 41SPCh. 18 - 18.42 [II] On a certain day the temperature is 20...Ch. 18 - 18.43 [II] How much water vapor exists in a 105-...Ch. 18 - 18.44 [II] Air at 30 °C and 90 percent relative...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Why is the following situation impossible? An ideal gas undergoes a process with the following parameters: Q = 10.0 J, W = 12.0 J, and T = 2.00C.arrow_forwardA styrofoam container used as a picnic cooler contains a block of ice at 0°C. If 564 g of ice melts in 1 hour, how much heat energy per second is passing through the walls of the container? The heat of fusion of ice is 3.33 x 10° J/kg. Answer in units of W.arrow_forwardA 175.0 km long electric power line made out of copper is installed during the Spring months at an average temperature of 10.9 °C. What is the change in the length of the power line on a hot Summer day, when the temperature is 41.9 °C? The coefficient of linear expansion for copper is 1.62×10-5 1/C°. Use positive sign for an increase in length and negative for a decrease. What is the change in the length of the cable on a -26.9 °C cold Winter day?arrow_forward
- One mole of oxygen gas is at a pressure of 6.40 atm and a temperature of 31.5°C. (a) If the gas is heated at constant volume until the pressure triples, what is the final temperature? °C(b) If the gas is heated so that both the pressure and volume are doubled, what is the final temperature?arrow_forwardIn an electrically heated home, the temperature of the ground in contact with a concrete basement wall is 11.8 oC. The temperature at the inside surface of the wall is 18.4 oC. The wall is 0.12 m thick and has an area of 7.6 m2. Assume that one kilowatt hour of electrical energy costs $0.10. How many hours are required for one dollar's worth of energy to be conducted through the wall?arrow_forwardAn apartment has a living room whose dimensions are 2.9 m x 5.5 m x 5.1 m. Assume that the air in the room is composed of 79% nitrogen (N2) and 21% oxygen (O2). At a temperature of 25 °C and a pressure of 1.01 x 105 Pa, what is the mass (in grams) of the air? Number Unitsarrow_forward
- An ideal gas at 20°C consists of 2.2 × 1022 atoms. 4.3 J of thermal energy are removed from the gas. What is the new temperature in °C?arrow_forwardWhen you jog, most of the food energy you burn above your basal metabolic rate (BMR) ends up as internal energy that would raise your body temperature if it were not eliminated. The evaporation of perspiration is the primary mechanism for eliminating this energy. Determine the amount of water you lose to evaporation when running for 30. minutes at a rate that uses 4.00 x 102 kcal/h above your BMR. (That amount is often considered to be the “maximum fat - burning” energy output.) The metabolism of 1.0 grams of fat generates approximately 9.0 kcal of energy and produces approximately 1.0 grams of water. (The hydrogen atoms in the fat molecule are transferred to oxygen to form water.) What fraction of your need for water will be provided by fat metabolism? (The latent heat of vaporization of water at room temperature is 2.5 x 106 J/kg.)arrow_forwardQuestion: An aluminum cup with a mass m = 22.3 g is partially filled with water at a temperature of T₂ = 66.6 °C. The internal volume of an aluminum cup is Val = 480.27 mL, it contains VW = 243.86 mL of water. The aluminium and water are in thermal equilibrium. An ice cube at 0.00° C is added to the water. This drops the temperature to Tf = 39.2 °C. Make the assumption that no energy is lost to the surroundings. Part 1) How much energy does the aluminum lose or gain during this process? Assume it remains at thermal equilibrium with the water. Give a positive answer if it loses energy and a negative answer if it gains energy. = -556 Your last answer was interpreted as follows: -556 Part 2) What is the mass of the ice cube? mice = 1 g Your last answer was interpreted as follows: 1 Part 3) What is change in the internal volume of the aluminium cup? Give a negative answer if it decreases and a positive answer if it increases. AVAL = 1 mL Your last answer was interpreted as follows: 1arrow_forward
- How much energy is required to change a 31 g ice cube from ice at -11 °C to steam at 112°C? The specific heat of ice is 2090 J/kg °C, the specific heat of water is 4186 J/kg °C and the specific heat of steam is 2010 J/kg °C. The heat of fusion of water is 333000 J/kg and the heat of vaporization is 2.26 × 106 J/kg. Answer in units of J.arrow_forwardEarly in the morning when the temperature is 5°C, gasoline is pumped into a car's 51 L steel gas tank until it is filled to the top. Later in the day the temperature rises to 25°C. Since the volume of gasoline increases more for a given temperature increase than the volume of the steel tank, gasoline will spill out of the tank. How much gasoline spills out in this case? Bsteet 35 x 10-6/K gasoline = 950 x 10-6/Karrow_forwardYou drop an ice cube into an insulated flask full of water and wait for the ice cube to completely melt. The ice cube initially has a mass of 90.0 g and a temperature of 0°C. The water (before the ice cube is added) has a mass of 890 g and an initial temperature of 24.0°C. What is the final temperature (in °C) of the mixture? (Assume no energy is lost to the walls of the flask, or to the environment.) °Carrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Heat Transfer: Crash Course Engineering #14; Author: CrashCourse;https://www.youtube.com/watch?v=YK7G6l_K6sA;License: Standard YouTube License, CC-BY