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Crank
3 years ago
11

The entropy of vaporization of water is 109.0 j/mol × k at its normal boiling point. what is the enthalpy of vaporization of wat

er at this temperature?
Chemistry
1 answer:
riadik2000 [5.3K]3 years ago
3 0
The entropy of a system can be calculated by the ratio of the total heat in the system and the temperature. Entropy is a measure used in thermodynamics to approximate the degree of disorder in a system. From the equation for entropy, we can calculate the enthalpy as follows:

S = H / T
109.0 J / mol K = H / 373.15 K
H = 40673.35 J / mol
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Answer : The final number of moles of gas that withdrawn from the tank to lower the pressure of the gas must be, 0.301 mol.

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At constant volume and temperature of gas, the pressure will be directly proportional to the number of moles of gas.

The relation between  pressure and number of moles of gas will be:

\frac{P_1}{P_2}=\frac{n_1}{n_2}

where,

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n_2 = final number of moles of gas = ?

Now put all the given values in the above expression, we get:

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0.5 M

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