.. 7.41 What amount of heat is necessary to raise 200.0 mol of helium from -28.0°C to 55.0°C if the gas is to remain at a constant volume of 100.0 L? What are the initial and final pressures of this gas? Sketch a PV diagram of this gas (He) process.

University Physics Volume 2
18th Edition
ISBN:9781938168161
Author:OpenStax
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Chapter3: The First Law Of Thermodynamics
Section: Chapter Questions
Problem 76P: (a) An ideal gas expands adiabatically from a volume of 2.0103 m3 to 2.5103 m3. If the initial...
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Question 7.41 only
340
CHAPTER 7. THERMODYNAMICS
(e) If the gas can only reach 90% of the new pressure, how much work will the
gas do on its environment?
(f) What is the ratio of the work done in parts (c) and (e)?
.. 7.41 What amount of heat is necessary to raise 200.0 mol of helium gas (He)
from -28.0°C to 55.0°C if the gas is to remain at a constant volume of 100.0 L?
What are the initial and final pressures of this gas? Sketch a PV diagram of this
process.
7.42 If 10.0 MJ of heat is applied to 300.0 mol of helium gas (He) at 0°C and
1.50 kPa, what will be the final temperature and pressure of the gas if it maintains
a constant volume of 500.0 L? Sketch a PV diagram of this process. What is the
amount of work done on the gas? n
..
7.43 While maintaining a constant temperature of 150.0°C, 100.0 mol of an
ideal
gas expands from 38.0 L to 59.5 L.
(a) How much work does the gas do on the environment?
(b) How much heat is transferred to or from the gas?
(c) What are the initial and final pressures of the gas?
(d) Sketch this process on a PV diagram.
7.44 While maintaining a constant temperature of 125.0°C, 100.0 mol of an
ideal gas with an initial volume of 1000.0 L has 1.0 MJ of work done on it by the
environment.
..
(b) How much work would be required to compress this gas from its initial state
to a final volume of 5.0 L?
(a) What is the final volume of the gas?
fuom its initial state
Transcribed Image Text:340 CHAPTER 7. THERMODYNAMICS (e) If the gas can only reach 90% of the new pressure, how much work will the gas do on its environment? (f) What is the ratio of the work done in parts (c) and (e)? .. 7.41 What amount of heat is necessary to raise 200.0 mol of helium gas (He) from -28.0°C to 55.0°C if the gas is to remain at a constant volume of 100.0 L? What are the initial and final pressures of this gas? Sketch a PV diagram of this process. 7.42 If 10.0 MJ of heat is applied to 300.0 mol of helium gas (He) at 0°C and 1.50 kPa, what will be the final temperature and pressure of the gas if it maintains a constant volume of 500.0 L? Sketch a PV diagram of this process. What is the amount of work done on the gas? n .. 7.43 While maintaining a constant temperature of 150.0°C, 100.0 mol of an ideal gas expands from 38.0 L to 59.5 L. (a) How much work does the gas do on the environment? (b) How much heat is transferred to or from the gas? (c) What are the initial and final pressures of the gas? (d) Sketch this process on a PV diagram. 7.44 While maintaining a constant temperature of 125.0°C, 100.0 mol of an ideal gas with an initial volume of 1000.0 L has 1.0 MJ of work done on it by the environment. .. (b) How much work would be required to compress this gas from its initial state to a final volume of 5.0 L? (a) What is the final volume of the gas? fuom its initial state
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