The initial carbon content (co) of the sample is 0.2 wt %. you are using a carbon rich environment (hydro-carbon gas) to set the surface-carbon content (c) at 1.0 wt %. using the figure 5.11 (no need to use error function), calculate how long it would take at 1500 degree c to reach a carbon content of 0.4 wt % at a distance of 5 mm from the surface. give answer in hour unit. highlight your final answer. note: temperature is 1500 degree c -not 1000 degree c.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml