1 mole of an
ideal gas is taken through the cyclic process shown to the left.
What could the force be in this case?
What could you substitute in for MASS?
Suppose the object was a cylinder, could could you find the Volume?
What is the formula for absolute pressure?
The pressure exerted by a person's lungs can be measured by having the
person blow as hard as possible into one side of a manometer.( see page
317 in the blue book and page 315 in the white book for reference as to
what a manometer looks like). If a person blowing into one side of an open
tube manometer produces a 70 cm difference in heights of the columns of
water in the manometer arms, what is the lung pressure?
According to Archimedes, the buoyant force is equal to the ______________ of fluid it displaces.
Once again, what can you substitute in for the MASS?
What is the formula for the buoyant force?
An irregularly shaped piece of metal has a mass of 90 grams in air.
It is suspended from a scale and the scale reads 75 grams when the piece
is submerged in water. What are the volume and density of piece of metal?
What are the 3 points that define an IDEAL fluid?
What do you call the path of the flow mentioned above?
What kind of flow do you have in which the paths are irregular?
What do you call the path of this kind of flow?
Fill in the blank: Concerning a closed pipe system, the mass that flows into a region will ____________ the mass that flows out of a region.
What is the equation of flow continuity?
Water flows from a 2.0 cm pipe at a speed of 0.35 m/s. How long will
it take to fill a 10-L container?
What is Bernoulli's Equation?
In an industrial cooling process, water is circulated through a system.
If the water pumped from the first floor through a 6.0 cm pipe with a speed
of 0.45 m/s under a pressure of 53,157.9 Pa, what will be the pressure
on the next floor 4.0 m above in a pipe with a diameter of 2.0 cm?
What are the units of Q? What are the units of m?
What are the units of DT?
Re-write the formula above and solve it in terms for c :
What are the units of c?
What is the significance of the D?
According to Conservation of Energy, Heat _____________ equals Heat _____________
A thin copper cup of mass 150-g containing 500-g of water is at a temperature of 20 degrees Celsius. A 225-g sample of an unidentified material at 508 degrees Celsius is lowered into the bath and the cup is sealed. After a few minutes, the system reaches a constant final temperature of 40 degrees Celsius. Determine the specific heat of the sample.
How many objects are losing heat? How many objects are gaining heat?
Solve for c
If something has specific heat it MUST be CHANGING in what?
If an object is NOT undergoing the answer above it must be involved
in what type of heat?
Write the formula for _______________ heat. (use answer above)
Re-write the formula above and solve it in terms for L :
What are the units for L:
Write the appropriate “ Heat of ………” word for the following processes
Melting = _________________ Freezing = __________________ evaporating = _________________
Condensing = ____________________
How much heat must be added to a 1.0 Kg mass of ice at – 10 degrees
Celsius in order to transform it into 110 degree Celsius steam?
(c(steam) = 2020 J/kgxC)
How many processes or states does this piece of ice go through?
Solve for Q
How many grams are in 3.75 moles of NaF2 ?
How many molecules are in 16.3 L of Cl2 at STP?
Consider the formula PV = nRT
What does P stand for? Units: OR
What does V stand for? Units:
What does n stand for?
What does T stand for? Units:
Re-Arrange the formula above and solve for R:
Units:
If 23.8 grams of Ammonia gas ( NH3 ) are to be put into a 10.0-L container at a pressure 202.6 kPa, at what temperature should the gas be maintained?
What needs to be determined before you begin this problem?
Solve for T?
What must the units of temperature be in when dealing with gas laws?
If a gas is placed in a piston at a specific pressure, yet there is no change in volume, the work done by the gas is?
Losing heat has what sign?
Gaining?
What is the sign of work if the gas does the work?
What is the sign of work if work is done on the gas?
Both Q(heat) and W(work) correspond to the transfer of energy.
What do you call the difference of Q and W? Hint: this answer depends on
a change in temperature
A cylinder containing a gas is sealed with a nearly frictionless piston at a pressure of 0.20 MPa. The cylinder is placed in contact with a source of heat and the gas very slowly expands, moving the piston, in such a way that the volume changes by 5 x 10-3 m3 . Assuming the process is isobaric, and given that 300 J of heat enters the system, determine its change in internal energy
What exponent will Mpa get?
What do you have to determine first?
Solve
Solve for DU:
Fill in chart below
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What can you determine when you know what you get OUT of an engine based
on what you put IN?
What do you call the MAXIMUM or IDEAL situation according to your answer above?
What must you remember about the temperature in an IDEAL situation?
1 mole of an
ideal gas is taken through the cyclic process shown to the left.
If the situation involves an ideal gas, what formula do you use?
By what value will you multiply your units of pressure by?
At what temperature is point B?
At what pressure is point B?
Using the ideal gas law and point B, solve for V1?
Solve for the volume at point A
(a) Compute the work (W) for each of the four processes.
If this process is cyclic, meaning that it returns to its original starting position, what is its change in internal energy?
DU =
(b) What is the NET work?
(c) What is T3?
An internal combustion engine using natural gas and air as a working substance has a temperature in the spark-ignited firing chamber of 2150 K and an exhaust temperature of 900 K. The difference between the heat supplied and the work done by the engine in one complete cycle is 460 J.
What does the word “difference” suggest?
What is another way to state “heat supplied”?
If the difference between the heat supplied and the work done by the engine in one complete cycle is 460 J, what are they really saying 460 J is?
If you were asked to find the ideal efficiency, what kind of engine
are we suggesting?
Solve for the maximum efficiency
How much work is done if the heat input is 790 J?
What is the ACTUAL efficiceny (meaning don’t use Carnot)