Calculate the enthalpy of hydration of NazCO3 if 5.19 g of NazCO3 dissolves in water and gives out 2.033 kJ of heat (Q) and 18.9 g of Na2CO3 • 10H20 dissolves in water and absorbs 2.639 kJ of heat (Q). The molecular weight for NazCO3 is 105.99 g/mol, Na CO3 10H20 is 286.14 g/mol. Na2CO3 (s) + excess H20 2Na* (aq) CO (ag) AH1 + 10H,O AH2 AH3 + excess H2O Na2CO3 • 10H2O (s)

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Chapter1: Chemical Foundations
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Calculate the enthalpy of hydration of NazCO3 if 5.19 g of NazCO3 dissolves in water
and gives out 2.033 kJ of heat (Q) and 18.9 g of Na2CO3 • 10H20 dissolves in water
and absorbs 2.639 kJ of heat (Q). The molecular weight for NazCO3 is 105.99 g/mol,
Na CO3 10H20 is 286.14 g/mol.
Na2CO3 (s) +
excess H20
2Na* (aq)
CO (ag)
AH1
+ 10H,O
AH2
AH3
+ excess H2O
Na2CO3 • 10H2O (s)
Transcribed Image Text:Calculate the enthalpy of hydration of NazCO3 if 5.19 g of NazCO3 dissolves in water and gives out 2.033 kJ of heat (Q) and 18.9 g of Na2CO3 • 10H20 dissolves in water and absorbs 2.639 kJ of heat (Q). The molecular weight for NazCO3 is 105.99 g/mol, Na CO3 10H20 is 286.14 g/mol. Na2CO3 (s) + excess H20 2Na* (aq) CO (ag) AH1 + 10H,O AH2 AH3 + excess H2O Na2CO3 • 10H2O (s)
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