1.) When gasoline burns in an automobile engine, the heat released causes the products CO2 and H20 to expand, which pushes the pistons outward. Excess heat is removed by the car's cooling system. If the expanding gases do 451 J of work on the pistons and the system loses 325 J to the surroundings as heat, calculate the change in internal energy in joules.

Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions
Section5.4: The First Law Of Thermodynamics
Problem 5.5CYU: Nitrogen gas (2.75 L) is confined in a cylinder under constant atmospheric pressure (1.01 105...
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Topic: Thermodynamics > The First Law of Thermodynamics
2.) Liquid water at 180°C and 1002.7 kPa has an internal energy of 762.0 kJ/kg and a specific
volume of 1.128 cm/g. (a) What is its enthalpy? (b) The water is brought to the vapour
state at 300°C and 1500 kPa, where its internal energy is 2784.4 kJ/kg and its specific
volume is 169.7 cm/g. Calculate the change in internal energy and the change of enthalpy
for the process.
Transcribed Image Text:2.) Liquid water at 180°C and 1002.7 kPa has an internal energy of 762.0 kJ/kg and a specific volume of 1.128 cm/g. (a) What is its enthalpy? (b) The water is brought to the vapour state at 300°C and 1500 kPa, where its internal energy is 2784.4 kJ/kg and its specific volume is 169.7 cm/g. Calculate the change in internal energy and the change of enthalpy for the process.
1.) When gasoline burns in an automobile engine, the heat released causes the products CO2
and H20 to expand, which pushes the pistons outward. Excess heat is removed by the
car's cooling system. If the expanding gases do 451 J of work on the pistons and the
system loses 325 J to the surroundings as heat, calculate the change in internal energy in
joules.
Transcribed Image Text:1.) When gasoline burns in an automobile engine, the heat released causes the products CO2 and H20 to expand, which pushes the pistons outward. Excess heat is removed by the car's cooling system. If the expanding gases do 451 J of work on the pistons and the system loses 325 J to the surroundings as heat, calculate the change in internal energy in joules.
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