A platter ol pircseed is mounted on fop of o gas-fited piston, As the birdseed on top of the platter is ealen the go expcinds sothermoly ond does 4172 of wonk How moch heat is tronsferred during this processt Ouiuosoe inok uoal

University Physics Volume 2
18th Edition
ISBN:9781938168161
Author:OpenStax
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Chapter1: Temperature And Heat
Section: Chapter Questions
Problem 120AP: You have a Dewar flask (a laboratory vacuum flask) that has an open top and straight sides, as shown...
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20
For the expansion of Gos B. how do the work and heat involved in this process olfect the internal energy of the
gose Explain your reasorning,
A platter of birdseed is mounted on top of a gas-filled piston, As the birdseed on top of the platter is ealen. ihe gos
expands jsothermally and does 4IZJof work How much heal is transferred during this procew?
Calculate the work done on or by a system thot absorbs 260 kJ of heat experiences a change in internal eniergy of
157KJ. Does the system expand or contracte How do you know?
10 A system releases 125 kJ of heat while 104 kJ of work is done on the system. Calculate the change in internal energy.
11. A heal engine undergoes a process in which its internal energy decreases by 400.0 J while if is doing 250 J of work.
What is the net heat is taken in (or given out) by the engine during this process?
12. 3000 J of heat is added to a system while 2000 J of work is done on the system. What is the change in internal energy
13. A system undergoes a process Gonsisting of the following two steps:
Step 1: The system absorbs 73 J of heat while 35 J of work is done on it.
Step 2: The system absorbs 35 J of heat while performing 72 J of work.
Colculate the change in internal energy for the overall process (in J):
14. A system does 450 J of work that results in an increase in intemal energy of 450 J.
a. How much heat is added or removed?.
O.
b. Does temperature increase, docrease, or remain the same? Explain.
15. When you pump a bicycle pump quickly, the compression is almost adiabatic because there isn't much fime for the
gas to exchange energy with anything. During a single pump, you do 36 J of work on 4.26 x 10 kg of air inside the
cylinder. How much does the internal energy of the air inside the pump change during a single pump?
16. A battery hamesses a chemical reaction to extract energy in the form of useful electrical work.
A certain battery runs a toy truck and becomes partially discharged. In the process, it performs a total of 117.0 J of
work on its immediate surroundings. It also gives off 3.0 J of heat, which the surroundings absorb. No other work or
heat is exchanged with the surroundings.
proper sign.
Compute q, w, and AU of the battery, making sure each quantity has the
Why?
Why?
Why?
D. The some battery is now recharged exactly to its origindal condition, This requires 210.0 J of electrical work from an
oulside generator. Determine Q for the battery in this process. Explain whyq has the sign Ihat it does.
Transcribed Image Text:20 For the expansion of Gos B. how do the work and heat involved in this process olfect the internal energy of the gose Explain your reasorning, A platter of birdseed is mounted on top of a gas-filled piston, As the birdseed on top of the platter is ealen. ihe gos expands jsothermally and does 4IZJof work How much heal is transferred during this procew? Calculate the work done on or by a system thot absorbs 260 kJ of heat experiences a change in internal eniergy of 157KJ. Does the system expand or contracte How do you know? 10 A system releases 125 kJ of heat while 104 kJ of work is done on the system. Calculate the change in internal energy. 11. A heal engine undergoes a process in which its internal energy decreases by 400.0 J while if is doing 250 J of work. What is the net heat is taken in (or given out) by the engine during this process? 12. 3000 J of heat is added to a system while 2000 J of work is done on the system. What is the change in internal energy 13. A system undergoes a process Gonsisting of the following two steps: Step 1: The system absorbs 73 J of heat while 35 J of work is done on it. Step 2: The system absorbs 35 J of heat while performing 72 J of work. Colculate the change in internal energy for the overall process (in J): 14. A system does 450 J of work that results in an increase in intemal energy of 450 J. a. How much heat is added or removed?. O. b. Does temperature increase, docrease, or remain the same? Explain. 15. When you pump a bicycle pump quickly, the compression is almost adiabatic because there isn't much fime for the gas to exchange energy with anything. During a single pump, you do 36 J of work on 4.26 x 10 kg of air inside the cylinder. How much does the internal energy of the air inside the pump change during a single pump? 16. A battery hamesses a chemical reaction to extract energy in the form of useful electrical work. A certain battery runs a toy truck and becomes partially discharged. In the process, it performs a total of 117.0 J of work on its immediate surroundings. It also gives off 3.0 J of heat, which the surroundings absorb. No other work or heat is exchanged with the surroundings. proper sign. Compute q, w, and AU of the battery, making sure each quantity has the Why? Why? Why? D. The some battery is now recharged exactly to its origindal condition, This requires 210.0 J of electrical work from an oulside generator. Determine Q for the battery in this process. Explain whyq has the sign Ihat it does.
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