Question 1For the "Specific Heat of Solid" experiment the following data table are found. Using the value from the table, calculate the specific heats [in J/(kg-°C)] of the Copper samples.Mass of metal sample [Copper]mm =0.3Mass of calorimeter cup while emptym. =0.1082[m] =0.3357Mass of cup with cold water in itMass of cold waterm, =0.2275Cw = 4186 J/kg-oCC = 1510 J/kg-oC4186Specific heat of waterSpecific heat of cupTemperature of cold waterFinal temperature1510Tw2132Temperature of metalTm800.00240285231494None of theseQuestionA Moving to another question will save this responseENCh45

Calorimeter is used to find the heat capacity. The heat capacity is the amount of heat required to…

For the "Specific Heat of Solid" experiment the following data table are found. Using the value from the table, calculate the specific heats [in 1/(kg-°C)] of the Copper samples 0.3 Mass of metal sample [Copper] Mass of calorimeter cup while empty me 0.1082 Mass of cup with cold water in it [m] = 0.3357 Mass of cold water m = 0.2275 Specific heat of water C, = 4186 J/kg-oC 4186 1510 C = 1510 J/kg-oC Tw = Specific heat of cup 21 Temperature of cold water Final temperature T = 32 Temperature of metal Tm = 80 0.002 402 852 31494 None of these

For the "Specific Heat of Solid" experiment the following data table are found. Using the value from the table, calculate the specific heats [in 1/(kg-°C)] of the Copper samples 0.3 Mass of metal sample [Copper] Mass of calorimeter cup while empty me 0.1082 Mass of cup with cold water in it [m] = 0.3357 Mass of cold water m = 0.2275 Specific heat of water C, = 4186 J/kg-oC 4186 1510 C = 1510 J/kg-oC Tw = Specific heat of cup 21 Temperature of cold water Final temperature T = 32 Temperature of metal Tm = 80 0.002 402 852 31494 None of these

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter20: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 20.3OQ: Assume you are measuring the specific heat of a sample of originally hot metal by using a...

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Assume you are measuring the specific heat of a sample of originally hot metal by using a calorimeter containing water. Because your calorimeter is not perfectly insulating, energy can transfer by heat between the contents of the calorimeter and the room. To obtain the most accurate result for the specific heat of the metal, you should use water with which initial temperature? (a) slightly lower than room temperature (b) the same as room temperature (c) slightly higher than room temperature (d) whatever you like because the initial temperature makes no difference
Compare the SI units of specific heat and latent heat and explain any differences.
A person inhales and exhales 2.00 L of 37.0C air, evaporating 4.00102g of water from the lungs and breathing passages with each breath. (a) How much heat transfer occurs due to evaporation in each breath? (b) What is the rate of heat transfer in watts if the person is breathing at a moderate rate of 18.0 breaths per minute? (c) If the inhaled air had a temperature of 20.0C, what is the rate of heat transfer for warming the air? (d) Discuss the total rate of heat transfer as it relates to typical metabolic rates. Will this breathing be a major form of heat transfer for this person?
Substance A has twice the specific heat of substance B. Equal masses of the two substances, at different temperatures, are placed in thermal contact and allowed lo come to equilibrium. (a) What is the ratio QB/QA of the energy transferred to (or from) the samples? (Hint: Remember to include the correct signs.) (b) What is the ratio TB/TA of their temperature changes?
Suppose a gasfilled incandescent light bulb is manufactured so that the gas inside the bulb is at atmospheric pressure when the bulb has a temperature of 20.0C. (a) Find the gauge pressure inside such a bulb when it is hot, assuming its average temperature is 60.0C (an approximation) and neglecting any change in volume due to thermal expansion or gas leaks. (b) The actual final pressure for the light bulb will be less than calculated in part (a) because the glass bulb will expand. What will the actual final pressure be, taking this into account? Is this a negligible difference?
What does it mean to say that two systems are in thermal equilibrium?
Markings to indicate length are placed on a steel tape in a room that is at a temperature of 22C. Measurements are then made with the same tape on a day when the temperature is 27C. Assume the objects you are measuring have a smaller coefficient of linear expansion than steel. Are the measurements (a) too long, (b) too short, or (c) accurate?
The latent heat of vaporization for water at room temperature is 2 430 J/g. Consider one particular molecule at the surface of a glass of liquid water, moving upward with sufficiently high speed that it will be the next molecule to join the vapor. (a) Find its translational kinetic energy. (b) Find its speed. Now consider a thin gas made only of molecules like that one. (c) What is its temperature? (d) Why are you not burned by water evaporating from a vessel at room temperature?
(a) It is difficult to extinguish a fire on a crude oil tanker, because each liter of crude oil releases 2.80107J of energy when burned. To illustrate this difficulty, calculate the number of liters of water that must be expended to absorb the energy released by burning 1.00 L of crude oil, it the water has its temperature raised from 20.0C to 100C, it boils, and the resulting steam is raised to 300C. (b) Discuss additional complications caused by the fact that crude oil has a smaller density than water.
Even when shut down after a period of normal use, a large commercial nuclear reactor transfers thermal energy at the rate of 150 MW by the radioactive decay of fission products. This heat transfer causes a rapid increase in temperature it the cooling system fails (1 watt 2 1 joule/second or 1W=1J/s and 1MW=1megawatt ). (a) Calculate the rate of temperature increase in degrees Celsius per second (C/s) if the mass of the reactor core is 1.60105kg and it has an average specific heat of 0.3349kJ/kgC. (b) How long would it take to obtain a temperature increase of 2000C, which could cause some metals holding the radioactive materials to melt? (The initial rate of temperature increase would be greater than that calculated here because the heat transfer is concentrated in a smaller mass. Later, however, the temperature increase would slow down because the 5105-kg steel containment vessel would also begin to heat up.) Figure 14.32 Radioactive spentfuel pool at a nuclear power plant. Spent fuel stays hot for a long time. (credit: U.S. Department of Energy)
A glass coffee pot has a circular bottom with a 9.00-cm diameter in contact with a heating element that keeps the coffee warm with a continuous heat transfer rate of 50.0 W (a) What is the temperature of the bottom of the pot, if it is 3.00 mm thick and the inside temperature is 60.0C ? (b) If the temperature of the coffee remains constant and all of the heat transfer is removed by evaporation, how many grams per minute evaporate? Take the heat of vaporization to be 2340kJ/kg.
A construction worker uses a steel tape to measure the length of an aluminum support column. If the measured length is 18.700 m when the temperature is 21.2C, what is the measured length when the temperature rises to 29.4C? Note: Dont neglect the expansion of the tape.