PRACTICE 9.11 When 25.0 mL of 1.0 M H 2 SO 4 is added to 50.0 mL of 1.0 M NaOH at 25.0 °C in a calorimeter, the temperature of the aqueous solution increases to 33.9 °C. Assuming that the specific heat of the solution is 4.18 J/(g • °C), that its density is 1.00 g/mL, and that the calorimeter itself absorbs a negligible amount of heat, calculate Δ H in kilojoules/mol H 2 SO 4 for the reaction. H 2 SO 4 (aq) + 2NaOH(aq) → 2H 2 O(l) + Na 2 SO 4 (aq)
PRACTICE 9.11 When 25.0 mL of 1.0 M H 2 SO 4 is added to 50.0 mL of 1.0 M NaOH at 25.0 °C in a calorimeter, the temperature of the aqueous solution increases to 33.9 °C. Assuming that the specific heat of the solution is 4.18 J/(g • °C), that its density is 1.00 g/mL, and that the calorimeter itself absorbs a negligible amount of heat, calculate Δ H in kilojoules/mol H 2 SO 4 for the reaction. H 2 SO 4 (aq) + 2NaOH(aq) → 2H 2 O(l) + Na 2 SO 4 (aq)
PRACTICE 9.11 When 25.0 mL of 1.0 M H2SO4 is added to 50.0 mL of 1.0 M NaOH at 25.0 °C in a calorimeter, the temperature of the aqueous solution increases to 33.9 °C. Assuming that the specific heat of the solution is 4.18 J/(g • °C), that its density is 1.00 g/mL, and that the calorimeter itself absorbs a negligible amount of heat, calculate
Δ
H
in kilojoules/mol H2SO4 for the reaction.
H
2
SO
4
(aq)
+
2NaOH(aq)
→
2H
2
O(l)
+
Na
2
SO
4
(aq)
Don't used hand raiting and don't used Ai solution
(9 Pts) In one of the two Rare Earth element rows of the periodic table, identify an exception tothe general ionization energy (IE) trend. For the two elements involved, answer the followingquestions. Be sure to cite sources for all physical data that you use.a. (2 pts) Identify the two elements and write their electronic configurations.b. (2 pts) Based on their configurations, propose a reason for the IE trend exception.c. (5 pts) Calculate effective nuclear charges for the last electron in each element and theAllred-Rochow electronegativity values for the two elements. Can any of these valuesexplain the IE trend exception? Explain how (not) – include a description of how IErelates to electronegativity.
Don't used hand raiting and don't used Ai solution
Chapter 9 Solutions
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