User Account

All Pages

Consider a pefc operating with the following specifications

Assignment Help Mechanical Engineering
Reference no: EM13626771

Consider a PEFC operating with the following specifications: = 80% and the pressure is 2 atm at the anode, and = 20% and the pressure is 3 atm at the cathode. Assume that the gibbs free energy of formation at standard pressure for at 90o C is -233,265 joules.
a) Calculate the Nernst voltage of the PEFC if the operating temperature is 90o C.
b) Find the change in Nernst voltage if the cathode pressure is reduced to 1.5 atm, all else the same.

Reference no: EM13626771

Questions Cloud

The piston is then released and equilibrium established : a rigid insulated cylinder is divided into two parts by a non-insulated frictionless piston which is initially held a
A mail-order company business has six telephone lines let x : a mail-order company business has six telephone lines. let x denote the number of lines in use at a specified time.
However the pump requires 60 w of parasitic power to : consider a l0-plate fuel cell stack at an anode stoichiometry of 1.2 with 20 a current generated in the stack and a
At these conditions the latent heat of vaporization of : 1000 kj of heat are added to 10 kg of saturated liquid ethanol at 78.4degc and 1 atm. at these conditions the latent
Consider a pefc operating with the following specifications : consider a pefc operating with the following specifications 80 and the pressure is 2 atm at the anode and 20 and the
A 1000 mw power plant is operated for a year it has a : a 1000 mw power plant is operated for a year. it has a thermal efficiency of 32 and a utilization factor of 0.8. assume
The pmf of the amount of memory x gb in a purchased flash : the pmf of the amount of memory x gb in a purchased flash drive is given as the
An individual who has automobile insurance from a certain : an individual who has automobile insurance from a certain company is randomly selected. let y be the number of moving
During test-out procedures a 239pu fueled thermal reactor : during test-out procedures a 239pu fueled thermal reactor is operated for a time at a power of 1 mw. the power is then

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  For a velocity field given by v01xi-01yj where x and y are

for a velocity field given by v0.1xi-0.1yj where x and y are in meters and v is in ms. finda. the equation of the

  What time will be required at 500degc to produce the same

the wear resistance of a steel shaft is to be improved by nitrogen hardening of its surface. the initial nitrogen

  Determine the minimum tensile strength each cable must have

due to a poorly designed foundation the statue at point a slowly slides down a grass covered slope. to prevent further

  Estimate how fast should the container accelerate in order

the 0.5m long container shown in the figure accelerates downhill 25 degrees to horizon so that the liquid surface is

  What fraction of the benzene is recovered in the

the 3m company removes benzene from synthetic resin-based sandpaper by passing the sandpaper product through a dryer in

  An adiabatic capillary tube is used in some refrigeration

an adiabatic capillary tube is used in some refrigeration systems to drop the pressure of the refrigerant from the

  The exit temperature of hot air is 20degc assuming constant

an adiabatic heat exchanger is used to heat cold water at 15degc entering at a rate of 5 kgs by hot air at 90degc

  A computer cpu chip operates at steady state with d-c

a computer cpu chip operates at steady state with d-c electrical input of 4.5 amps at 9 volts. to prevent the chip from

  Determine the entropy change of the water in kjkg middotk

two kilograms of saturated water vapor at 600 kpa are contained in a piston-cylinder device. the water expands

  What is the acceleration of the truck

What is the acceleration of the truck if the coupling at C suddenly fails? The car wheels are free to roll. Neglect the mass of the wheels.

  Determine a the largest value less than 45deg of the angle

the initial velocity v0 of a hockey puck is 105 mih. determine a the largest value less than 45deg of the angle a for

  The question to address is what have you learned about

the final paper provides you with an opportunity to integrate and reflect on what you have learned during the class.the

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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