3 years ago

Help me please I’ll give brainlest

Chemistry

1 answer:

drek231 [11]3 years ago

4 0

Answer:

50%

Explanation:

um- punnett squares are weird lol

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During a skin burn from an oven, approximate the skin and tissue layer to be infinitely thick compared to the damaged layer. The

Vlad [161]

Answer:

The depth of the damage is given as $x = 1.357*10^{-3}m$

Explanation:

From Fick's second law

$\frac{C_{x}-C_{0}}{C_{s}-C_{0}} = 1 -erf [\frac{x}{2\sqrt{Dt} } ] ...(1)$

Where

$C_x$ is the temperature when the skin is damage

$C_0$ is the initial temperature of the skin

$Cs$ is the temperature of the oven

erf is a mathematical function known as error function

D is the thermal diffusivity

x is the depth of the damage

From the question we are given that

$C_x$ = 62°C

$C_0$ = 33°C

D = $2.5 * 10^{-7} m^2/s.$

Substituting values into equation one

$\frac{62-33}{200-33} = 1 -erf [\frac{x}{2\sqrt{2.5*10^{-7}} *2} ]$

$erf[\frac{x}{1.414*10^{-3}} ] = 0.826\\$

Let assume that $z =\frac{x}{1.414*10^{-3}} ... (2)$

Hence

$erf(z) = 0.826$

Looking at the table of error function shown on the first uploaded image

We can use interpolation to obtain the value of z in this manner

$\frac{z-0.95}{0.8260-0.8209} = 1$

z = 0.96

Substituting the value of z into equation 2

$0.96 = \frac{x}{1.414*10^{-3}}$

$x = 1.357*10^{-3}m$

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3 years ago