when 1.00L of 2.00 M Na 2SO4 at 30.0 C is added to 2.00 L of 0.750 M Ba (NO3)2 a
ID: 869684 • Letter: W
Question
when 1.00L of 2.00 M Na 2SO4 at 30.0 C is added to 2.00 L of 0.750 M Ba (NO3)2 at 30.0 C a white precipitate forms and the temperature raises to 420 C. Write the precipitation reaction that occurs. Find the delta triangle H on KJ / mol of BaSO4 formed if the specific heat, C= 6.37J/ C g and density, d= 2.00g/ mol. when 1.00L of 2.00 M Na 2SO4 at 30.0 C is added to 2.00 L of 0.750 M Ba (NO3)2 at 30.0 C a white precipitate forms and the temperature raises to 420 C. Write the precipitation reaction that occurs. Find the delta triangle H on KJ / mol of BaSO4 formed if the specific heat, C= 6.37J/ C g and density, d= 2.00g/ mol. Write the precipitation reaction that occurs. Find the delta triangle H on KJ / mol of BaSO4 formed if the specific heat, C= 6.37J/ C g and density, d= 2.00g/ mol.Explanation / Answer
Precipitation reaction :
Na2SO4(aq) + Ba(NO3)2(aq) -----> BaSO4(s)+ NaNO3(aq)
Volume of mixer = 2+1 = 3 L = 3000 ml
mass of mixer = D*V
= 3000*2 = 6000 grams
according to thermodynamics
q= m*C*DT
DT = Tf-ti = 420-30 = 390 C
q = 6000*6.37*390
q = 14905.8 kj
As Tempertaure increases means energy releases in the reaction.
DHrxn = -14905.8 kj/mol
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