Following is the - complete Answer -&- Explanation: for the given: Question Set...in...typed format...
Answer:
Explanation:
Following is the complete: Explanation: for the above: Answers...in...typed format...
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Question - 1:
We know, from Equation -1 , the following molar ratio, between products and reactants:
molar ratio: Ca(OH)2 : HCl : CaCl2 : H2O = 1 : 2 : 1 : 2
Therefore: if moles, of Ca(OH)2 = 2.26 moles, we will have the following:
We know the following:
Compounds | Standard enthalpy of formation ( i.e. Hfo ) [=] kJ / mol |
Ca(OH)2 (aq) | -1002.82 kJ / mol |
HCl (aq) | -167.2 kJ / mol |
CaCl2 (s) | -795.8 kJ / mol |
H2O | -285.8 kJ/mol |
Therefore: the value of the change in enthalpy: of the reaction: Equation - 1: will be: the following:
Hrxn.o = [ (2.26 moles) x ( Hfo[CaCl2 ] ) + (4.52 moles) x (Hfo[H2O] ) ] - [ (2.26 moles) x ( Hfo[Ca(OH)2 ] ) + ( 4.52 moles) x ( Hfo[HCl ] ) ]
Hrxn.o = [ (2.26 moles) x ( -795.8 kJ / mol ) + (4.52 moles) x (-285.8 kJ/mol ) ] - [ (2.26 moles) x ( -1002.82 kJ / mol ) + ( 4.52 moles) x ( -167.2 kJ / mol ) ]
Hrxn.o = - 68.2 kJ = - 68200 J ( Joule )
Therefore: we will get the following:
Sosurrounding = - Hrxn.o / T = - ( - 68200 J ) / ( 298 K ) = 228.86 J/K
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Question - 2:
We know, from Equation -2 , the following molar ratio, between products and reactants:
molar ratio: CO : O2 : CO2 = 2 : 1 : 2
Therefore: if moles, of CO(g) = 1.60 moles, we will have the following:
We know the following:
Compounds | Standard enthalpy of formation ( i.e. Hfo ) [=] kJ / mol |
CO (g) | -110.525 kJ/mol |
O2 (g) | 0.0 kJ / mol |
CO2 (g) | -393.509 kJ/mol |
Therefore: the value of the change in enthalpy: of the reaction: Equation - 1: will be: the following:
Hrxn.o = [ (1.60 moles ) x ( Hfo[ CO2 (g) ] ) ] - [ (1.60 moles) x ( Hfo[CO(g) ] ) + ( 0.8 moles ) x (Hfo[O2 ] ) ]
Hrxn.o = [ (1.60 moles ) x (-393.509 kJ/mol ) ] - [ (1.60 moles) x ( -110.525 kJ/mol ) + ( 0.8 moles ) x ( 0.0 kJ / mol ) ]
Hrxn.o = - 452.77 kJ = - 452774 J ( Joule )
Therefore: we will get the following:
Sosurrounding = - Hrxn.o / T = - ( - 452774 J ) / ( 298 K ) = 1519.376 J / K
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