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22 December, 07:39

Calculate Delta E when 33.0 g of carbon dioxide sublimes at 77.0 K and 1 ATM

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  1. 22 December, 07:48
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    To solve this problem, we establish the general energy balance:

    ΔE = ΔU + ΔKE + ΔPE

    ΔE = Q + W

    Q + W = ΔU + ΔKE + ΔPE

    In this case, ΔKE and ΔPE are both zero or negligible.

    Given:

    m = 33.0 grams of CO2

    Tsub = 77 K

    P = 1 atm

    ΔE = Q + W

    ΔE = mCpΔT + ΔPV

    solve for mCpΔT, find the value of Cp for CO2, then solve for Q. Next, solve for W using the ideal gas law. Add the two values and that will be the value of the delta E.
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