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# Chemical Physics

Chemical physics involves chemistry and physics in the investigation of the physicochemical phenomena using techniques from atomic and molecular physics and condensed matter physics. Chemical physics studies chemical processes from a physicist’s point of view. Although names are similar, chemical physics is different from physical chemistry due to the fact chemical physics studies the characteristic elements and theories of physics. Physical chemistry studies the physical nature of chemistry.

Chemical physics is a subset of the fields in quantum mechanics, solvation of molecular energy flow and quantum dots. Chemical physicists probe structures and dynamics of ions, free radicals, clusters, molecules and polymers. They do these probing experiments by various spectroscopic techniques. Chemical physics is an interdisciplinary field. The research areas include, DNA interactions, electrochemistry of semiconductors, fuel cells, ultrasound medical imaging and catalyst development to name a few. A chemical physicists' goal is to understand chemical structures and reactions at a quantum mechanical level. The goal is to make accurate approximations in physics of chemical phenomena computationally accessible.

### Calculating the mass of hydrogen purified hourly

A sheet of palladium having a cross-section area of 0.15 m^2 and 5 mm thick is used as steady state diffusion membrane for hydrogen. Calculate the mass of hydrogen being purified per hour, if the concentration gradient (difference in concentration on both sides of membrane) of hydrogen on high pressure side is 1.5 kg/m^3. The di

### Deriving Equations about Chemical Potential

Derive equation dU = Tds - PdV + ε_i μ_i dN_I, where the chemical potential for the ith type of particle is μ_i = (∂U / ∂N_I)_S,V,Nk

### Water, Osmosis, Cellular Function, and Turgor Pressure

Review physical and chemical properties of water. How might changes in temperature affect cellular function? How might water pollution affect cellular function? How might it affect water movement in cells and plants? OR What are roles of osmotic potential or turgor pressure in regulating water potential of plant cells? Exp

### Physics: Calculate the PV work that is done ON the system

1.) What is the PV work that is done ON the system when a.) 20J of PV work is done on the surroundings W(system)= b.) one mole of gas is generated in a chemical reaction at 0 Celsius and 1 atmospheric pressure c.) A chemical reaction occurs where the volume decreases by 600L

### Physics: Basic function, design, and operation of semiconductor lasers, diodes, and transistors

The basic function, design, and operation of semiconductor lasers. How semiconductor devices like diodes, transistors, and semiconductor lasers are manufactured. What scientific principles/techniques are important in designing and manufacturing electronic devices, including a brief discussion of why the principles/techniques

### Nuclear Physics

1. Why does a fusion reactor produce less waste than a fission reactor? 2. How many grams of 235U must undergo fission to operate a 1 GW power plant for one day if it is 30% efficient? Assume each fission releases 208 MeV. (1 MeV = 1.6x10-13 J) (1 g 235U = 2.5x1021 atoms). 3. Describe the purpose of the follow

### Physics: Gaseous Reactions

1) For a chemical reaction of the type: 2 A = A_2 the equilibrium constant K(T) of the law of mass action at the temperature of 18 degrees C is 0.00017. The total pressure of the gaseous mixture is 1.0 atm. Find the percentage of dissociated molecules. 2) Knowing that the heat of reaction for the reaction considered

### Occupation number if two particles can occupy the same state

Please see the attached Microsoft Word document.

### Physical Science: basic research, matter, physical property, chemical change

1. Which of the following would be considered basic research? a. testing the strength of a mouse cage b. examining why a mouse likes cheddar cheese more than swiss cheese c. testing a safe, nontoxic mouse glue d. studying ways of catching mice safely e. examining how quickly a trapdoor closes 2. Whic

### Isotopes, Half Lives and Neutron Activation

Please see the following posting for questions regarding isotopes, half-lives and neutron activation. See attached file.

### Chemical reaction is described.

You are a supervisor in a car assembly plant where each car produced requires one body and four wheels. You discover that the plant has 200 bodies and 900 wheels. How many cars can be made from this inventory? Explain. Describe also how this situation relates to chemical reaction.

### A Discussion on Various Chemical and Physical Science Concepts

1. The density of the liquid flowing through the horizontal pipe in the drawing above is 1500 kg/m3. The speed of the fluid at pint A is 5.5 m/s while at point B it is 8.0 m/s. What is the difference in pressure, PB - PA, between points B and A? a.) -1.9 x 103 Pa b.)+3.8 x 103 Pa c.)-2.5 x 104 Pa d.)+5.0 x 104 Pa e.)-7.

### Acceleration, speed, air resistance, density, temperature, work

1. You push with a 50-N horizontal force on a 10 kg mass resting on a horizontal surface against a horizontal friction force of 20N. What is the acceleration? 2. A railroad diesel engine weighs six times as much as a freight car. If the diesel engine coasts a 7km per hour into a freight car that is intially at rest, how f

Bromine has two natural isotopes, BR-81 (49.5%) and Br-79 (50.5%) a) What are the atomic numbers and neutron numbers of these isotopes? b) Use this information to explain why the atomic weight of chlorine is 79.9 Br-80 decays by beta emission with a half-life of 17.6 minutes a) Write down the decay equation showing the dau

### Particle Physics

1. In an electrolysis experiment, a student plated silver onto an electrode, maintaining a current of 1.600 A for 46.0 min. What mass of silver was deposited? a. 4.94 g b. 2.47 g c. 11.2 g d. .02 g 2. A sample of polonium has a half-life of 2.7 min and an intial activity of 1.0 x 10^6 Bq. What is its act

### Multiplicity for an ideal monatomic gas.

In problem 2.26 you found the multiplicity for an ideal monatomic gas that lives in a two-dimensional universe. It was (see attachment). As implied, the multiplicity is determined by the internal energy, the area occupied by the gas, and the number of particles in the gas. From these, determine the temperature, 'pressure', an

### Basic properties of the hydrogen wave functions.

An electron state in the hydrogen atom can be designated by the quantum numbers n, l, m and s a. What is the physical significance of each quantum number b. Describe how these numbers can be used to assemble the periodic table. c. Find the normalization constant and <r> for state n=2, l=1, m=0 See attached file for full