College Physics: A Strategic Approach (4th Edition)
4th Edition
ISBN: 9780134609034
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
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Textbook Question
Chapter 12, Problem 9P
An ideal gas is at 20°C. The gas is cooled, reducing the thermal energy by 10%. What is the new temperature in °C?
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m = 0.593 kg of methanol in atmospheric pressure is heated with an electric heater from T₁ = 30.2 °C to its boiling point. After the heating my
methanol is vaporized. Heating and vaporizing takes t = 450.41 s with n=0.59 heater's efficiency.
What is the volume of methanol?
V =
What is the energy required for heating?
E₁ = 1
kJ
m³
Your last answer was interpreted as follows: 1
What is the energy required for vaporizing?
Ev = 1
kJ
Your last answer was interpreted as follows: 1
What is the power of the heater?
P = 1
с
Your last answer was interpreted as follows: 1
Your last answer was interpreted as follows: 1
What is the electr. energy needed for heating and vaporizing?
Eε = 1
kJ
Your last answer was interpreted as follows: 1
h
Do not leave any fields blank. If you don't know the answer, insert 1 for example.
Insert the answer with 3 significant digits
without rounding the answer.
Constant
P
Tb
Value Unit
2.53
1165
786.3
64.7 °C
umges
Quantity
heat capacity
kg K
kJ
kW
kg
kg
LAN
Symbol
h…
Incandescent lightbulbs are filled with an inert gas to lengthen the filament life. With the current off ( at T = 20.0 degrees Celsius ), the gas inside a lightbulb has a pressure of 113 kPa. When the bulb is burning, the temperature rises to 89.4 degrees Celsius. What is the pressure at the higher temperature?
A helium balloon is filled to 2.5 L at 290 K. Outside, on a cold winter day, the balloon shrivels to 2.2 L. What is the outside temperature in Celsius?
Chapter 12 Solutions
College Physics: A Strategic Approach (4th Edition)
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