Number of rubber molecules per unit volume

Assignment Help Mechanical Engineering
Reference no: EM13720646

Calculate the Gibbs free energy change of a rubber band stretched to 5 times its original length with concurrent contractions in its other two dimensions of 2.24 times at 25 C. The number of rubber molecules per unit volume, N, for a typical rubber is about N=10NA #/m^3 , where NA is Avogadro’s number.

Reference no: EM13720646

Questions Cloud

How high will the ball rise after its second bunch : A ball is dropped from a height of 1.0m, bounces off the floor and is observed to rise up a maximum height of .8 m. How high will the ball rise after its second bunch?
Two mass are connected by a light inextensible cord : Two mass are connected by a light inextensible cord that passes over a homogeneous 4-kg cylinder having a diameter of 1200 mm. How long will it take the 7-kg mass to move from rest to a speed of 2 m/s^2
Derive the general kirsch equation : The following stress state exists around a wellbore drilled in the Atlantic Ocean: sigma x = sigma y = 80 bar   sigma zz = 100 bar    tau xy = tau xz = tau yz = 0   Pw = 80 bar. Derive the general Kirsch equation (Aaddnoy version)
Discuss how you would solve this problem using gas tables : Twenty pounds of a gas mixture is contained in a tank with volume 30 cubic feet at 30 psia and 70 F.  The gas mixture has volumetric analysis of twenty percent carbon dioxide, thirty percent oxygen, and fifty percent nitrogen. Discuss how you would s..
Number of rubber molecules per unit volume : Calculate the Gibbs free energy change of a rubber band stretched to 5 times its original length with concurrent contractions in its other two dimensions of 2.24 times at 25 C. The number of rubber molecules per unit volume, N, for a typical rubber i..
Determine the minimum beam height-mass of beam : A new cylindrical tank is being designed for SeaWorld, where the 3m high Plexiglass wall will be supported using I-beams spaced 2m apart. The beams are to be constructed from 13mm steel plate (t=b) having a yield strength of 250MPa. This design shoul..
Calculate the work required to reversibly compress : The virial equation of state for n-butane at 460K is Z=1+A/V+B/V^2 in which A =-265 cm^3/g and B= 30250 cm^6/(g*mole^2). Calculate the work required to reversibly compress one mole of n-butnae from 50 atm to 100 atm at 460K
Decrease in the gibbs free energy of the system : An moles of an ideal gas A ad (1-n) moles of an ideal gas B, each at 1 atm pressure, are mixed at total constant pressure. What ratio of A to B in the mixture maximizes the decrease in the Gibbs free energy of the system?
The temperature on the left edge of the wall : A one dimensional wall of material (Kw=10w/mk) is 50 mm thick with uniform heat generation q‘‘‘=5*10^6w/m^3. The left side is exposed to a fluid hl=500w/m^2k at 20 degree Celsius. The right side has a 10mm thick plate attached that has no heat genera..

Reviews

Write a Review

 

Mechanical Engineering Questions & Answers

  Find the maximum length of the specimen before deformation

A cylindrical specimen of a titanium alloy having an elastic modulus of 107 GPa and an original diameter of 4.0 mm will experience only elastic deformation when a tensile load of 1,500 N is applied. Find the maximum length of the specimen before defo..

  Dow long it would take to empty a 12-oz

estimate the rate in galhr that your car uses gasoline when it is being driven on an interstate highway. determine how

  An air standard diesel cycle has a compression ratio of 20

an air standard diesel cycle has a compression ratio of 20 and the heat transferred to the working fluid per cycle is

  Activation energy for vacancy formation in aluminum

Calculate the expected number of vacancies that will exist in a cubic inch of Aluminum at room temperature (25°C), provided that the activation energy for vacancy formation in Aluminum is equal to 0.75 eV/atom.

  Determine the current supplied if the final temperature is

a mass of 12kg of saturated refrigerant-134a vapor is contained in a frictionless piston-cylinder device at 240kpa. now

  Water vapor in a piston-cylinder assembly undergoes process

Water vapor in a piston-cylinder assembly undergoes a process from saturated vapor at 150°C to a pressure of 300 kPa. During the process, the pressure and specific volume are related by pv 1.2 = constant. Neglecting kinetic and potential energies, d..

  There is no significant change in kinetic energy and no

water is drawn at steady state from a body up 15 m to a storage tank by a pump. pressure at the opening of the pump is

  What is the actual strain

You have a 120 Ω quarter bridge 2 wire set up with Sg=2.10 and an unknown lead wire resistance. A 59880Ω calibration resistor is switched in parallel to the gage only and a recording instrument is set to give a -100 mm deflection for this calibrat..

  Circular cylinder in cross-flow at a free stream velocity

Water at 20°C flows past a circular cylinder in cross-flow at a free stream velocity of 0.5 m/s. The cylinder is 0.02m in diameter and has a length of 0.5m in the cross-stream direction. The cylinder is at a temperature of 60°C. Find the rate at whic..

  A tool with a weight of 500lb moves continuously from the

a cantilevered boom is part of an assembly machine. a tool with a weight of 500lb moves continuously from the end of

  A 90 percent efficient turbine accepts water at 400 kpa in

a 90 percent efficient turbine accepts water at 400 kpa in a 16 cm diameter pipe. what is the maximum power output if

  Find the position of the car

The acceleration of the car is defined by a=(2t^2+t)m/s^2. Find the position of the car at t = 3 seconds. The car starts from rest.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd