The heat absorbed when 2.8 mol NH₄NO₃ is dissolved in water is 71.96 kJ.
<h3>What is heat?</h3>
Heat is the transportation of energy to or from a thermodynamic system.
By the formula of heat
![\rm (n) \times (delta\;Hrxn) = (qrxn)](https://tex.z-dn.net/?f=%5Crm%20%28n%29%20%5Ctimes%20%28delta%5C%3BHrxn%29%20%3D%20%28qrxn%29)
Where n = moles
Delta Hrxn is molar heat
q = heat
Putting the values in the equation
![\rm qrxn = (2.8 mol) \times(25.7 kJ/mol) = 71.96 kJ](https://tex.z-dn.net/?f=%5Crm%20qrxn%20%3D%20%282.8%20mol%29%20%5Ctimes%2825.7%20kJ%2Fmol%29%20%3D%2071.96%20kJ)
Thus, the heat absorbed when 2.8 mol NH₄NO₃ is dissolved in water is 71.96 kJ.
Learn more about heat
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Answer:
The molarity of a solution prepared by dissolving 54.3 g of Calcium nitrate into 355 mL of water is 0.9881M
Molarity of solution is the ratio of the number of moles of the substance to the volume.
n is the number of moles of the compound
Mass of calcium nitrate = 54.3g
Molar mass of calcium nitrate = Ca(NO₃)₂ = 164.088 g/mol
Get the required molarity;
Hence the molarity of a solution prepared by dissolving 54.3 g of Calcium nitrate into 355 mL of water is 0.9881M
Explanation:
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