Homework Help: Chemistry help please

Posted by T on Sunday, December 16, 2012 at 12:15pm.

You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 359.5 ppm and is initially uniform through the thickness of the steel. The atmosphere of the carburizing furnace maintains a carbon concentration of 6695.0 ppm at the surface of the steel. Calculate the time required to carburize steel so that the concentration of carbon at a depth of 38.0 x 10-2 cm is one half the value of the carbon concentration at the surface. The diffusion coefficient of carbon in steel is 3.091 x 10-7 cm2/s at the carburizing temperature. Express your answer in hours.

DATA: Error Function Values
erf(ξ < 0.6), use the approximation erf ξ = ξ
erf(1.0) = 0.84
erf(2.0) = 0.998

Chemistry help please - Ms. Sue, Sunday, December 16, 2012 at 12:16pm
See the Related Questions below.
Chemistry help please - rene, Sunday, December 16, 2012 at 3:15pm
answer, pls

Answer this Question

Related Questions

Chemistry - You wish to increase the carbon content of a slab of steel by ...
physics - You wish to increase the carbon content of a slab of steel by exposing...
Chemistry - You wish to increase the carbon content of a slab of steel by ...
science - You wish to increase the carbon content of a slab of steel by exposing...
chemistry - You wish to increase the carbon content of a slab of steel by ...
chemistry - You wish to increase the carbon content of a slab of steel by ...
Chemistry - You wish to increase the carbon content of a slab of steel by ...
Chemistry - You wish to increase the carbon content of a slab of steel by ...
Chemistry - You wish to increase the carbon content of a slab of steel by ...
Chemistry - You wish to increase the carbon content of a slab of steel by ...

For Further Reading

First Name:
School Subject:
Answer: