Sample problem: In a calorimeter, completely neutralize 100 mL of an aqueous solution of sodium hydroxide (NaOH) at 0.5 mol/L by adding 100 mL of a hydrochloric acid (HCI) solution at 0.5 mol/L. The initial temperature of the solutions before being mixed is 22.5 C. The highest temperature obtained during the neutralization, after the two solutions are mixed, is 25.9 C. Calculate the molar heat of neutralization of sodium hydroxide. DATA: Motal = C= AT = Q=? Step 1 Calculation of the quantity of heat transferred:

Sample problem: In a calorimeter, completely neutralize 100 mL of an aqueous solution of sodium hydroxide (NaOH) at 0.5 mol/L by adding 100 mL of a hydrochloric acid (HCI) solution at 0.5 mol/L. The initial temperature of the solutions before being mixed is 22.5 C. The highest temperature obtained during the neutralization, after the two solutions are mixed, is 25.9 C. Calculate the molar heat of neutralization of sodium hydroxide. DATA: Motal = C= AT = Q=? Step 1 Calculation of the quantity of heat transferred:

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Consider the following thermochemical equations (Note: HA is a weak acid)H+(aq) + OH-(aq) → H2O(l) ΔH1HA(aq) → H+(aq) + A-(aq) ΔH2HA(aq) + OH-(aq) → A-(aq) + H2O(l) ΔH3Choose the equation that shows the correct relationship between their enthalpy changes.
A stude. right). as two experiments with a constant-volume "bomb" calorimeter containing 1100. g of water (see sketch at thermometer stirrer First, a 7.500 g tablet of benzoic acid (C,H,CO,H) is put into the "bomb" and burned completely in an excess of water oxygen. (Benzoic acid is known to have a heat of combustion of 26.454 kJ/g.) The temperature of the water is observed insulation to rise from 17.00 °C to 57.08 °C over a time of 15.0 minutes. Next, 4.440 g of ethane (C,H,) are put into the "bomb" and similarly completely burned in an excess of oxygen. This olo time the temperature of the water rises from 17.00 °C to 62.17 °C. chemical reaction "bomb" Ar Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about this reaction: A "bomb" calorimeter. 20,H, (g) + 70,(g) 4Co,g) + 6H,0 () Be sure any of your answers that are calculated from measured data are rounded to the correct number of significant digits. Note for…
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Compute for the enthalpy (heat) of neutralization in Joules using the following data: Volume of HCI, mL = 50 • Volume of NaOH, mL = 50 • Initial temperature of the mixture, °C = 29.973 Final temperature of the mixture, °C = 38.283 Assume that density is 1.0 g/ml and C = 4.184 J/g-°C No units required. Express your answer in 3 decimal places.
2. Calculate AH for the reaction: CH4 (g) + 4 Cl2 (g) CCI4 (g) +4 HCl (g) Use the following reactions and given AH's. C (s) + 2 H2 (g) C (s) + 2 Cl2 (g) H2 (g) + Cl2 (g) CH4 (g) AH =-74.6 kJ CC14 (g) AH =-95.7 kJ 2 HCl (g) AH =-92.3 kJ 61 shot on moto g' power Crystal H.
Sample Bomb Calorimetry Problem: A bomb calorimeter was heated for 568 seconds with a 15.00 watt heater 1J (1 watt = s ). The temperature of the calorimeter rose by 2.00 C. A 0.455-g sample of solid sucrose (CızH22O1) was then burned in excess molecular oxygen gas in the same calorimeter. The temperature increased from 24.49 C to 26.25 C. Calculate: a) the heat capacity for the calorimeter b) the molar hcat of combustion for sucrose (both AHo and AU) c) the number of calories in a gram of sucrose (Note: 1 calorie = 4.184 J) Solution:
com/myct/itemView?offset3Dnext&assignmentProblemID=182385266 dynamics Feedback 2 of 25 I Review | Constants | Periodic Table Part A . You in your When 0.645 g Mn is combined with enough hydrochloric acid to make 100.0 mL of solution in a coffee-cup calorimeter, all of the Mn reacts, raising the temperature of the solution from 23.2 °C to 29.5 °C. ce Find AHn for the reaction as written. (Assume that the specific heat capacity of the solution is 4.18 J/g °C and the density is 1.00 g/mL.) Txn O -224 kJ O -4.08 kJ O -1.45 kJ O -2.63 kJ
artis aal i. Based on Textbook 2.35-2.37: Orthopedic surgeons use bone “cement" to set artificial hip implants in place. This "“cement" is methyl methacrylate that is polymerized during the surgery. However, surgeons notice a substantial amount of heat evolution from the reaction. Calculate the reaction energy if a surgeon uses 20g of methyl methacrylate glue (the precursor) to set a given hip implant. The polymerization reaction is given for you. free radical CH3 c=c CH3 +CH;-C c=0 H vinyl polymerization C=0 CH3 CH3
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ab The enthalpy of solution (AH) of NaNO3 is 20.4 kJ/mol. If 8.50 g NaNO3 is dissolved in enough water to make a 100.0 mL solution, what is the change in temperature (°C) of the solution? (The specific heat capacity of the solution is 4.184 J/g °C and the density of the solution is 1.02 g/mL). Tap here or pull up for additional resources 1 Q @ 2 W # 3 E $ 4 R % 5 T Question 1 of 10 6 Y & 7 U 8 1 9 1 4 7 +/- 0
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