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vivado [14]
3 years ago
14

Which physical change is endothermic

Chemistry
1 answer:
Gala2k [10]3 years ago
7 0

Answer:The physical changes that are endothermic are melting, vaporization and sublimation.

Explanation:

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A mixture of gases containing 0.20 mol of SO2 and 0.20 mol of O2 in a 4.0 L flask reacts to form SO3. If the temperature is 25ºC
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Answer : The pressure in the flask after reaction complete is, 2.4 atm

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To calculate the pressure in the flask after reaction is complete we are using ideal gas equation.

PV=n_TRT\\\\P=(n_1+n_2)\times \frac{RT}{V}

where,

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

P=(0.20+0.20)mol\times \frac{(0.0821L.atm/mol.K)\times (298K)}{4.0L}

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