August 08, 2022, 03:53:29 AM
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### Topic: Thermodynamics Question  (Read 640 times)

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#### MagicSeaweed

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##### Thermodynamics Question
« on: April 20, 2022, 01:44:43 AM »
A saturated 0.1mol.L-1 KNO3 solution was prepared by placing KNO3 crystals in 5mL water in a test tube and by heating the test tube up to ~95 °C. The test tube is allowed to cool down and at 85 °C small crystals start to appear in the solution. 5 mL water is added and the test tube is heated again in order to dissolve all the crystals. The test tube is again allowed to cool down and at 49 °C small crystals start to appear in the solution. Calculate the following thermodynamical entities of the dissolution process of KNO3:
(a)  standard enthalpy of dissolution [6½]
« Last Edit: April 20, 2022, 08:57:15 AM by Borek »

#### Borek

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##### Re: Thermodynamics Question
« Reply #1 on: April 20, 2022, 02:46:48 AM »
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info

#### MagicSeaweed

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##### Re: Thermodynamics Question
« Reply #2 on: April 20, 2022, 04:12:20 AM »
I apologize, I forgot to include it.

#### mjc123

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##### Re: Thermodynamics Question
« Reply #3 on: April 20, 2022, 03:17:51 PM »
Your calculation at the end makes no sense. What is the equation you are trying to use, and what values are you putting into it?