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5 April, 21:27

What is the effect of the following on the volume of 1 mol of an ideal gas? The temperature changes from 305 K to 32°C and the pressure changes from 2 atm to 101 kPa.

A. Volume increases by 200%

B. Volume decreases to 50% of its original value

C. Volume decreases by 100%

D. Volume increases by 100%

E. Volume does not change

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  1. 5 April, 21:41
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    The volume increases by 100%.

    Explanation:

    Step 1: Data given

    Number of moles ideal gas = 1 mol

    Initial temperature = 305 K

    Final temperature = 32°C + 273.15 = 305.15 K

    Initial pressure = 2 atm

    final pressure = 101 kPa = 0.996792 atm

    R = gasconstant = doesn't change

    V1 = initial volume

    V2 = the final volume

    Step 2: Calculate volume of original gas

    P*V = n*R*T

    (P*V) / T = constante

    (P1 * V1) / T1 = (P2 * V2) / T2

    In this situation we have:

    (2atm * V1) / 305 = (0.996792 * V2) / 305.15

    0.006557*V1 = 0.003266*V2

    V2 = 2*V1

    We see that the final volume is twice the initial volume. So the volume gets doubled. The volume increases by 100%.
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