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Thermodynamics

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Thermodynamics
Drawing a blank studying last minute for an exam: when does a piston cylinder not follow the 2nd law of thermodynamics!!!!

chemistry(thermodynamics)
questions related to thermodynamics

SCI
Please help me in understanding this. Differentiate between the First Law of Thermodynamics and the Second Law of Thermodynamics.

science
what is the difference between the First Law of Thermodynamics and the Second Law of Thermodynamics.

Thermodynamics 2nd Law
The 2nd law of thermodynamics states that “in any spontaneous process, the total entropy of the universe always increases”. Yet in biological systems there are processes where there is a decrease in entropy during a reaction. Give an example of a biological process where ...

thermodynamics
Which of these statements are in accord with the three laws of thermodynamics? -A-The entropy of the universe never decreases -B-A nonspontaneous process can occur if it is coupled to a process which is sufficiently spontaneous -C-The temperature of the universe stays the same...

Chemsitry
Which of the laws of thermodynamics provides a criterion for spontaneity? the zeroth law, the first law, the second law, and the third law? This site will give you zeroth, first, second, and third laws. You may need to scroll down a little but it on the right of center of the ...

PHYSICS-LAW OF THERMODYNAMICS
A dinner plate drops and breaks. This best illustrates the ______ law of THERMODYNAMICS A. 1st b. 2nd c. 3rd d. 4th I am inclined to say the 1st because energy can be neither created nor destroyed, it can only change forms. Thus the plate falling lost it's energy as a whole, ...

science
Identify the fruit or vegetable you selected and relate the second law of thermodynamics to the changes in energy observed in Appendix C. How did the amount of energy gained compare to the amount of energy lost as heat at the second through fourth trophic levels? o Answer the ...

env, sci
distinguish between the first law of thermodynamics energy and the second law of thermodynamics energy Energy as defined in both laws has the same meaning. It is the laws that are different. The second law involves the direction of heat flow, the role of temperature and a ...

physics
Which of the following is a True Statement? PLEASE EXPLAIN ANSWER A) It is possible for heat to flow spontaneously from a hot body to a cold one of from a cold one to a hot one, depending on whether or not the process is reversible or irreversible. B) It is impossible to ...

thermodynamics
what is difrent between cp and cv

chemistry
about thermodynamics

biology
what is the second law of thermodynamics.

chemisttry
what is the significance of delta H,S,G in thermodynamics

thermodynamics
H° = 565 kJ and S° = -11.1 J/K Calculate G° at 25°C for this reaction.

Thermodynamics
What are the different types of Diffusers?

physics
is the bubble chamber an example of thermodynamics?if not then what?

science
What is a simple definition for the 2nd law of Thermodynamics?

thermodynamic
what is the difference between thermodynamics and heat transfer

thermodynamics
what is enthalpy of pure ethly alcohol at 1atm?

Science
Can you please explain about the black hole thermodynamics?

Biology
4) Explain why organisms do not violate the second law of thermodynamics?

thermodynamics
equal to 1/4 th of the heat rejected to the sink. the efficiency of the engine is

Thermodynamics
how many calories are absorbed when 250.0 grams of warm water from 20.0c to 60.0c?

Chemistry
Is it the second law of thermodynamics that provides a criterion for spontaneity? I don't think so yes

Engineering
How does an air conditioner use the first and second laws of thermodynamics?

SCI 275
does thermodynamics have a direct effect on a food chain?

Thermodynamics
Would someone explain entropy in simple terms please. Thanks.

thermodynamics
how many molecules of air are there in 1 litre flask at 293K, if the preessure in it is 0.3 atm.

thermodynamics
how much of energy need to evaporate 1 kg moles of hydrated water

physics
'perpetual motion' is ruled out of the realm of possibility because of which law of thermodynamics?

Science
What is the realtionship between the second law of thermodynamics and Gibbs free energy

Chemistry
How would you define pressure in the unit of thermodynamics? Is it just a force basically?

Thermodynamics
If 25.4 kg of copper at 33°C receives 240 kJ of heat. Calculate the final temperature of the metal.

Govt.sen.sec.school darlaghat
state and explain 1st law of thermodynamics

physics
1- Describe an imaginary process that satisfies the first law but violates the second law of thermodynamics. 2-Describe an imaginary process that satisfies the second law but violates the first law of thermodynamics.

environmental science
I need help understanding the second law of thermodynamics. These terms I just do not seem to understand.

Biology
Using the fundamentals of thermodynamics, explain why we must continue to eat in order to maintain homeostasis?

Science
Your thermodynamics calculation involves mass and a change in temperature. What SI base units would you use?

Chemistry (Thermodynamics)
Write a balanced equation for the complete combustion of 1 mole of ethyne gas (C2H2) ?

Physical Science
The second law of thermodynamics forbids a heat engine to have thermal efficiency of what?

thermodynamics
The outward evidence for this transformation can be seen only in the mechanical motion of the motor. True False

thermodynamics statistical machenics
For copper, take N/V =8.5×10^28m^-3, h=6.62×10^-34Js, and me =9.1×10^-31kg to calculate Fermi energy.

Chem Check
The first law of thermodynamics is the application of the conservation of energy principle to heat and thermodynamic processes.

Physics
Use the Second law of thermodynamics to explain why an ice cube cools off your warm soda.

science
Based on the first and second laws of thermodynamics, explain how energy flows through your selected ecosystem

Thermodynamics
Hello, Can i know what are the different types of diffusers ? Plz don't tell me to google it, becaus ei already did so, and its not much of great help. Thank you

Thermodynamics
What temperature change in Celsius degrees is produced when 800.00 calories are absorbed by 120.0 grams of water?

Thermodynamics
In a multiple-device flow system, I want to determine a state property. Where should I look for information, upstream or downstream?

thermodynamics
an automobile having a mass of 1.250 kg is traveling at 40m/s. what is its energy in kJ? how much work must be done to bring it to a stop?

sci 275
identify the fruit or vegatable you selected and relate the second law of thermodynamics to the changes in energy observed in appendix c.

physics
A dinner plate drops and breaks. This best illustrates the ______ law of THERMODYNAMICS A. 1st b. 2nd c. 3rd d. 4th

chemistry
How is it possible for a chemical rxn to be highly spontaneous and have a negative entropy value? Isn't this inconsistent with the 2nd law of thermodynamics?

Int.science/Laws of Thermodynamics
The outward evidence for this transformation can be seen only in the mechanical motion of the motor. True False

Science
Relative abundance of weight? If a hawk eats a fish and does not acquire all the energy in the fish's body because of the second law of thermodynamics then what implications would have a relative abundance by weight of predators and their prey? I understand the laws of ...

Physics
Use the first law of thermodynamics to determine the amount of heat change, Q, and whther it was added to or removd from the system. W=225J Delta U=600J Q=?

Int.science/Laws of Thermodynamics
The efficiency of the engines in the two previous problems are the same, comparing the input and output temperatures. True False

Science
Air is compressed until a small piece of cotton is ignited. From a standpoint of thermodynamics what is Happening at a molecular level? Energy cant be created of destroyed?

Chemistry(DrBob222)
for a thermodynamics lab, I have to graph the ln K vs. 1/T, so does the ln K go on the y-axis and the 1/T go on the x-axis?

Thermodynamics
Can I have any energy transfer as heat transfer that is 100% available? Explain with equation

Biology
In your own words, explain the second law of thermodynamics and explain why it is not violated by living organisms?

AP Chemistry
for a thermodynamics lab, I have to graph the ln K vs. 1/T, so does the ln K go on the y-axis and the 1/T go on the x-axis?

chemistry thermodynamics
a sample of methane gas of mass 25g at 250k and 18.8atm expands isothermally until its pressure is 2.5atm. calculate the change in entropy.

thermodynamics
Air is compressed isothermally at 20 degree C from 95 Kpa to 750 Kpa. Find the work during the process in KJ.

thermodynamics
find change in enthalpy and change in entropy when liquid water at 30¡ãc is converted to steam at 40 bar,375¡ãc.

Physics ~Thermodynamics~
* Pressure * 1) what other ways can the pressure of a gas be changed? * Internal Energy * 2) A cup of hot tea is poured from a teapot, and a swimming pool if filled with cold water. a) Which one has a higher internal energy? b) Which has a higher average of kinetic energy? * ...

Biology
What law of thermodynamics explains the fact that if you drop an egg, the shell will not spontaneously repair itself? The second law

Thermodynamics
Suppose an enzyme lowers the activation energy by an order of magnitude. What is the ratio of catalyzed rate to the uncatalyzed rate at at 25 °C? at 37 °C?

thermodynamics
design a 1200-W electric hair dryer such that the air temperature and velocity in the dryer will not exceed 50 C and 3 m/s respectively

thermodynamics
1. An ideal gas at 40psig and 80 degree F is heated in a closed container to 120 degree F. What is the final pressure, psia?

thermodynamics
a drum has height of 5 meters filled with water and open to atmosphere. compute for pressure acting st the middle of the drum.

thermodynamics
deremine (a) the work done and (b) the change in internal energy of 1.00 kg of water when it is all boiled to steam at 100c. Assume a constant pressure of 1.00 atm and heat of vaporisation = 2260000 J.

thermodynamics
deremine (a) the work done and (b) the change in internal energy of 1.00 kg of water when it is all boiled to steam at 100c. Assume a constant pressure of 1.00 atm and heat of vaporisation = 2260000 J.

Thermodynamics
Two objects are at different temperatures,and occurs thermal equilibrium, does the size of the object affects the transfer of heat? I need help. This doubt is not allowing me to continue in my homework.

Thermodynamics
Determine the units of viscosity,m, in the following equation: t=m(du/dy), where t is a shear stress, u a velocity, and y is a distance in (a) the Engineering English system, and (b) the SI system.

thermodynamics 2
Calculate the change in enthalpy of a superheated steam at 700 psia and 680°F is expanded at constant entropy to 140 psia.

Thermodynamics (Chemistry)
Ag(s) + Cl2(g) --> 2AgCl(s) ∆H and ∆S are 254.14kJ and –115.0J/K respectively. Calculate equilibrium constant, K for the reaction at 500K?

Thermodynamics
A sample consisting of 2,0 moles of diatomic perfect gas molecules at 250K is compressed reversibly and adiabatically until its temperature reaches 300K. Given Cv,m 27,5 JK/mol calculate q, w, dU, dH,dS

thermodynamics
If 150 kj of energy in used in accelerating a load of 1.5 tones at the rate of 0.56 m/s . Calcukate the distance of the load will have travelled along a level surface

college chemistry
If gaseous H2 and O2 are carefully mixed and left alone, they can remain intact for millions of years. Is this “stability” a function of thermodynamics or of kinetics? Give a valid reason to support your choice.

thermodynamics and statistical machenics
Consider sun as a black body whose interior consist of photons gas at T = 3×10^6k. Calculate the energy density of the solar radiations. Take (sigma) = 7.56×10^-16jm^-3k^-4

Chemistry
In thermodynamics, the standard pressure is 100 kPa. What is this value in units of atmospheres. I got 9.86x10^-7 atm but the book said .9869 atm. who's right?

Vector Calculus
Thermodynamics texts use the relationship (dy/dx)(dz/dy)(dx/dz) = -1 Explain the meaning of this equation and prove that it is true (Hint: Start with a relationship F(x,y,z) = 0 that defines x = f(y,z), y = g(x,z), and z = h(x,y) and differentiate implicitly)

chemistry
Utilizing the concept of the second law of thermodynamics, explain why an ice skater requires less energy expenditure to cover the same distance as a roller skater. ?

Thermodynamics
What is the ideal work for the separation of an equimolar mixture of methane and ethane at 175 C and 3 bar into product streams of pure gases at 35 C and 1 bar if Tsigma = 300 K?

thermodynamics and kinetics
One mole of an ideal gas undergoes an isothermal reversible expansion, doing 1 kJ of work and doubling the volume. What is its final temperature? How much heat was added to the gas?

Thermodynamics
Suppose you start with a liquid mixture of 60% nitrogen and 40% oxygen. Describe what happens as the temperature of this mixture increases. Be sure to give the temperatures and compositions at which boiling begins and ends.

Thermodynamics
Suppose you start with a liquid mixture of 60% nitrogen and 40% oxygen. Describe what happens as the temperature of this mixture increases. Be sure to give the temperatures and compositions at which boiling begins and ends.

Thermodynamics
Suppose you start with a liquid mixture of 60% nitrogen and 40% oxygen. Describe what happens as the temperature of this mixture increases. Be sure to give the temperatures and compositions at which boiling begins and ends.

Thermodynamics
Suppose you start with a liquid mixture of 60% nitrogen and 40% oxygen. Describe what happens as the temperature of this mixture increases. Be sure to give the temperatures and compositions at which boiling begins and ends.

Thermodynamics
5 mol of an ideal gas is kept at 394◦C in an expansion from 1 L to 5 L .How much work is done by the gas? Answer in units of J.Given: R = 8.31 J/K/mol ,

Science
you are a patent agent, an inventor comes to you claiming he has invented a self-powered engine that requires no fuel to run. will you agree to patent this invention? why or why not? use the first law of thermodynamics. can anyone help me out with this?

thermodynamics and kinetics
One mole of an ideal gas at 25C and 1 bar is allowed to expand adiabatically against a constant external pressure of 1.00 bar from 1.00 dm^3 to 10.00 dm^3. Calculate the final temperature, q, w, delta_U and delta_H.

thermodynamics and static machenics
For thermocouple,the value of C1 and C2 are 40.0×10^-6 v°/c and -0.01×10^-6 v°/c^2 respectively.If the thermo emf between the junction is 2.3×10^-2 v and the cold junction is kept at the ice point,calculate the temperature of the hot junction.

physics
can i have multiple choice questions on thermodynamics: relationship between work and heat, the first law of thermodynamic, and the second law of thermodynamic

thermodynamics
the mass of a fluid system is .311 slug, its density is 30lb.ft^3 and g is 31.90fps^2. a) find the specific volume, b) the specific weight, and c) total volume

RE: Physics: Thermodynamics
well the second law states that natural processes go in a direction that maintains or increases the total entropy of the universe. entropy is the measure of disorder in a system, so I really do not know the best way to answer this problem

physics
Choose one of the Laws of Thermodynamics (zeroth, first, second, or third) and give a brief summary of its development. Who is credited with "discovering" it and when? How did the four laws come to be ordered as they are? Please explain in detail

thermodynamics
if a pump discharges 75 gpm of water whose specific weight is 61.5 lb/ft^3(g=31.95fps^2). find a) the mass flow rate in lb/min, and b) and total time required to fill a vertical cylinder tank 10ft in diameter and 12ft high.

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