50 mL of 0.15 M Cu2+ solution was prepared. 5 mL increments of 1.5 M NH4OH (onequivalent) were added in a calorimeter and the change intemperature were noted on each addition. Assuming the density of the solution is 1 g/mL and the specific heat of the solution is a constant 4.18 J/g Cthe following data were obtained:Trial 1-total volume 55 mL- T1 = 22C, T2 = 24.8CTrial 2-total Volume 60 mL, T1 = 22.3 C, T2 = 24.9C%3DTrial 3-total Volume 65 mL, T1 = 22.1C, T2 = 24.5C%3DTrial 4 - total Volume 70 mL, T1 = 21.9C, T2 = 24.1CTrial 5 - Total Volume 75 mL, T1 = T2 = 22.3CWhat is the Coordination Number of Cu2+ in Ammonia?What is the average dq for bond formation?What is the average Delta H (J/mol) of bond formation?

When Cu+2 coordinates with ammonia forms an octahedral complex (Cu (H2O)2(NH3)4]2+ ( the water being…

Answered: 50 mL of 0.15 M Cu2+ solution was…

Living By Chemistry: First Edition Textbook

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ChapterU5: Fire: Energy , Thermodynamics, And Oxidation-reduction

SectionU5.9: Counting Calories: Calorimetry Calculations

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A 50.15 g of iron with an initial temperature of 100.26°C was put in 105.73 g of ethanol (specific heat of ethanol = 2430 J/kg∙K) with an initial temperature of 20.11°C. The final temperature of the system (assuming there's no heat exchange between the container, thermometer, and the environment) is 26.45°C. If you are asked to compute for the experiment value of the specific heat of the iron, how much is the percent error of the experiment (accepted/standard value of the specific heat of iron is 448 J/kg∙K)? less than 1% between 1% to 5% between 5% to 10% more than 10%
A pipet is used to transfer 5.00 mL of a 1.25 M stock solution in flask “S” to a 25.00-mL volumetric flask “B,” which is then diluted with DI H2O to the calibration mark. The solution is thoroughly mixed. Next, 3.00 mL of the solution in volumetric flask “A” is transferred by pipet to a 50.00-mL volumetric flask “B” and then diluted with DI H2O to the calibration mark. Calculate the molarity of the solution in volumetric flask “B.”
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For items 1-3, refer to the equation: CH4(g) + 2O2(g) → 2H2O(l) + CO2(g), with ΔH equal to -809.94 kJ/mol.1. Is the reaction heat-producing (exothermic) or heat-absorbing(endothermic)?2. How many moles of liquid water (H2O(l)) will be produced upon combustion of 3 moles of methane gas (CH4(g))?3. Calculate the ΔH if 5g of methane gas was combusted.For the following items, choose the letter of the correct answer. Write it on your answer sheet in ALL UPPERCASE letters. 4. A process in which there is no thermal energy exchanged between a system and its surroundings is called a/an:a. isothermal process b. isobaric processc. diathermic process d. adiabatic process5. According to Hess’ Law, the amount of energy expenditure for the same end-product will vary dependent on the number of steps.a. Statement above is true.b. Statement above is incorrect.c. Statement above is indeterminate.d. Statement above lacks varied data to make a judgement. Please answer all the questions.
For items 1-3, refer to the equation: CH4(g) + 2O2(g) → 2H2O(l) + CO2(g), with ΔH equal to -809.94 kJ/mol.1. Is the reaction heat-producing (exothermic) or heat-absorbing(endothermic)?2. How many moles of liquid water (H2O(l)) will be produced upon combustion of 3 moles of methane gas (CH4(g))?3. Calculate the ΔH if 5g of methane gas was combusted.
A pipet is used to transfer 6.00 mLmL of a 3.75 MM stock solution in flask “S” to a 25.00-mL volumetric flask “A,” which is then diluted with DI H2OH2O to the calibration mark. The solution is thoroughly mixed. Next, 10.00 mLmL of the solution in volumetric flask “A” is transferred by pipet to a 50.00-mL volumetric flask “B” and then diluted with DI H2OH2O to the calibration mark. Calculate the molarity of the solution in volumetric flask “B.”
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On analysis, a coal sample has the following composition by weight; C = 75 %, O2 = 4 %, S = 5 %, and ash = 3%. Net calorific value of the fuel is 9797.71 kcal / kg. Calculate the percentage of hydrogen and gross calorific value of coal.

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