0 This is a Mixed question/It is worth 1 point/You have 7 of 7 attempts remainin
ID: 698350 • Letter: 0
Question
0 This is a Mixed question/It is worth 1 point/You have 7 of 7 attempts remaining/There is no attempt penalty 11 Question (1 point) a See page 393 A91.2 ml sample of 1.00 M NaOH is mixed with 45.6 mL of 1.00 M H2S04 in a large Styrofoam coffee cup: the cup is fitted with a lid through which passes a calibrated thermometer. The temperature of each solution before mixing is 21.25°C. After adding the NaOH solution to the coffee cup and stirring the mixed solutions with the thermometer, the maximum t 1.00g/mL, that the specific heat of the mixed solutions is 4.18 J/g C), and that no heat is lost to the surroundings. emperature measured is 31.50 °C. Assume that the density of the mixed solutions is 1st attempt Part 1 (0.3 point) il See Periodic Table Write a balanced chemical equation for the reaction that takes place in the Styrofoam cup. Remember to include phases chemical equation. in the balancedExplanation / Answer
Balanced equation : H2SO4 + 2NaOH ----> Na2SO4 + 2H2O
1 mol H2SO4 = 2 MOL nAoh
no of mol of h2so4 = 45.6*1 = 45.6 mmol
no of mol of NaOH = 91.2*1 = 91.2 mmol
no limiting/excess reagent present.
answer: No
part3
heat released = m*s*DT
= (91.2+45.6)*4.184*(31.5-21.25)
= 5.9 kj
DH0rxn = - q/n = -5.9/(45.6*10^-3) = -129.4 kj/mol
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.