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An insulated cylinder closed at one end by a frictionless piston contains 20g of hydrogen gas at 30 degrees Celsius.
A toy model for DNA molecules. A DNA molecule is made of two complementary strands, which are hold together by hydrogen bonds.
Define the partition function Z for a system in terms of the energies E1 of its quantum states j and the inverse temperature /3 = (I T)''.
An ideal gas with Cp/Cv=1.5 where Cp and Cv are respectively the heat capacities at constant pressure and constant volume, is used as the working substance
A system whose equation of state depends only on pressure P, volume V and temperature T is taken quasi-statically from state from state A to state B
The molar energy of a mono atomic gas which obeys van der waals equation is given by:
An insulated frame wall of a house has an average thermal conductivity of 0.0318 Btu/h-ft^2-R degrees. The wall is 6 in thick and it has an area of 160 ft^2.
The word acceleration means that something is speeding up or slowing down .......its speed (velocity) is changing.
The working fluid contained in a well-insulated piston cylinder is expanded in a quasi-equilibrium process from 1000oF and 350 [psia] until the temperature
In our ChemE lab, we were asked to place a 25 cm x 25 cm x 1 cm (thick) block of wood in a water bath.....the rate of water absorption into the wood block
Distinguish between reversible and irreversible processes in thermodynamics. Describe the circumstances under which a) dQ = Tds and dW = -PdV.
As a patent agent, an inventor comes to you claiming that he has invented a self-powered engine that requires no fuel to run
The second law of thermodynamics is often cited as a reason that biological evolution is not possible. What types of assumptions lead to this conclusion?
We can say that life on earth is supported by the sun as the ultimate energy source and that life on earth would not exist without this source of energy.
Steam at 800 kPa, 600°C enters a steady flow turbine and leaves at 100 kPa. The steam undergoes an expansion process through the turbine
Air from inside a house enters a steady-flow heat exchanger with a volume flow rate of 200 m3/min at 15°C, 100kPa and eaves the heat exchanger at 35°C.
A piston-cylinder device contains 5kg of steam at 100kPa, quality of 50%. This steam undergoes two processes as follows:
A cube 10 cm on each edge contains air (equivalent molar mass 28.9 g/mol) at atmospheric pressure and temperature 27 degree C. Find the mass of gas
Gaseous Propane at 25 degrees C is burned with moist air at 400K in a steady state, steady flow process.
As an egg develops into a chicken, its contents become more ordered. Does this violate the law of increasing entropy? Why?
Perform a simulation investigating three special processes - isobaric (constant pressure), isochoric (constant volume), and isothermal (constant temperature)
Consider n infinitely long hollow conducting tube tht is split in half with each half held at the indicated potential.
By applying a pressure of 200 atm, you can compress water to 99% of its usual volume. Sketch this process on a PV diagram, and estimate the work
A Joule cycle consists of two adiabats and two isobars: 1--> 2 and 3 ---> 4 are adiabatic compression and expansion respectively; 2 ---> 3 and 4 --->1
A supply of geothermal hot water is to be used as the energy source in an ideal Rankine cycle, with R-134a as the cycle working fluid. (See the diagrams below)