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Enthalpy from a reaction
What is the change in temperature when 3.00 grams of calcium chloride...
1. The heat capacity of a calorimeter is given as 1264 J/oC. Suppose the enthalpy of...
1. The heat capacity of a calorimeter is given as 1264 J/oC. Suppose the enthalpy of solution for calcium chloride (MM=111 g/mol) in water is given by the thermochemical equation: CaCl2(s) + H2O(l) → Ca2+(aq) + 2Cl-(aq) ΔH = -81.0 kJ/mol. Calculate the temperature change if 11.1 g of calcium chloride is dissolved in water in the calorimeter. 2. Given the following data, calculate ΔH for the reaction of two moles of carbon monoxide with oxygen gasto give carbon dioxide....
When 23.6 g of calcium chloride, CaCl2, was dissolved in water in a constant-pressure calorimeter, the...
When 23.6 g of calcium chloride, CaCl2, was dissolved in water in a constant-pressure calorimeter, the temperature rose from 25.0 C to 38.7 C. If the heat capacity of the solution and the calorimeter is 1258 J/C, what is the enthalpy change when 0.710 mol of calcium chloride dissolves in water? The solution process is CaCl2(s) --> Ca2+(aq) + 2Cl–(aq)
When 10.0 grams of LiBr are dissolved in 100.0 grams of water in a calorimeter, the...
When 10.0 grams of LiBr are dissolved in 100.0 grams of water in a calorimeter, the temperature increases from 30.00°C to 42.22°C. Use this information to determine the enthalpy change in units of kJ/mol of reaction. Assume the specific heat of the solution is the same as that of pure water (4.18 J/g •°C). -120. kJ -4.43 kJ -4.88 kJ -56.2 kJ -48.8 kJ
8. A student conducts an experiment to determine the enthalpy of solution for lithium chloride dissolved...
8. A student conducts an experiment to determine the enthalpy of solution for lithium chloride dissolved in water. The student combines 5.00 grams of lithium chloride with 100.0 ml of distilled water. The initial temperature of the water is 23.0 °C and the highest temperature after mixing reaches 33.0 °C. Assume a density of 1.00 g.ml and a specific heat of 4.18 J/gºC. a. Is the reaction endothermic or exothermic? Justify your answer. b. Calculate the temperature change of the...
25.0 grams of calcium chloride are allowed to dissolve in 100.0mL in an insulated styrofoam calorimeter....
25.0 grams of calcium chloride are allowed to dissolve in 100.0mL in an insulated styrofoam calorimeter. The temperature of the water before calcium chloride is added is 22.0 degrees celsius. After dissolving, the maximum temperature of the solution is 73.6 degrees celsius. a) Calculate the heat absorbed by the water. b) Is this q(p) or q(v)? c) Calculate deltaH for the reaction CaCl2(s) yields CaCl2(aq) (units should be kJ per mole.) d) Is deltaH any different from deltaE for this...
The enthalpy of neutralization is −55.8 kJ/mol. What is the temperature change when 100 mL of...
The enthalpy of neutralization is −55.8 kJ/mol. What is the temperature change when 100 mL of 2 M HNO3(aq) is mixed with 100 mL of 2 M KOH(aq)? (assume density and specific heat capacity are the same as water)
3. When 15.7 g of calcium chloride (CaClz) was dissolved in 200.0 ml of water in...
3. When 15.7 g of calcium chloride (CaClz) was dissolved in 200.0 ml of water in a coffee-cup calorimeter, the temperature of the solution increased from 25.00 °C to 34.13 °C, the dissolution of CaCl in water in units of kJ per mole of CaCl,. Calculate the entha lpy change(AH otn)for You can assume that the calorimeter loses only a negligible quantity of heat, that the total solution is 200.0 mL (adding the solid CaCl, did not change the volume...
The change in enthalpy for dissolving ammonium nitrate in water is 26 kJ/mol. Determine the amount...
The change in enthalpy for dissolving ammonium nitrate in water is 26 kJ/mol. Determine the amount of ammonium nitrate (in grams) that was dissolved in water to make 50.0 mL of solution if the temperature of a coffee cup calorimeter changes from 25.3°C to 21.5°C. Assume the density of the solution is 1.0 g/mL and the heat capacity of the solution is 4.2 J/g°C.
We did a lab where we dissolved calcium chloride and ammonium nitrate in water (calorimeter), and...
We did a lab where we dissolved calcium chloride and ammonium nitrate in water (calorimeter), and used the temperature change of the water to calculate the molar enthalpy of solution for each compound. I got -68.6kJ/mol for calcium chloride and +27.6kJ/mol for ammonium nitrate. There is a section in our lab report that states, "discuss the relationship between the responding and manipulated variable, and give reasons as to why this relationship exists." Our teacher told us that the manipulated variable...
find enthalpy change 3. When 2.617 g of AX (s) dissolves in 141.2 g of water...
find enthalpy change
3. When 2.617 g of AX (s) dissolves in 141.2 g of water in a coffee-cup calorimeter the temperature rises from 24.5 °C to 36.5 °C. Calculate the enthalpy change (in kJ/mol) for the solution process. AX(s) - A+ (aq) + X(aq) Assumptions for this calculation: The specific heat of the solution is the same as that of pure water (4.18 J/gK) The density of water = 1.000 g/mL. The liquid's final volume is not changed by...
8. A student conducts an experiment to determine the enthalpy of solution for lithium chloride dissolved in water. The student combines 5.00 grams of lithium chloride with 100.0 ml of distilled water. The initial temperature of the water is 23.0 °C and the highest temperature after mixing reaches 33.0 °C. Assume a density of 1.00 g.ml and a specific heat of 4.18 J/gºC. a. Is the reaction endothermic or exothermic? Justify your answer. b. Calculate the temperature change of the...
3. When 15.7 g of calcium chloride (CaClz) was dissolved in 200.0 ml of water in a coffee-cup calorimeter, the temperature of the solution increased from 25.00 °C to 34.13 °C, the dissolution of CaCl in water in units of kJ per mole of CaCl,. Calculate the entha lpy change(AH otn)for You can assume that the calorimeter loses only a negligible quantity of heat, that the total solution is 200.0 mL (adding the solid CaCl, did not change the volume...
find enthalpy change
3. When 2.617 g of AX (s) dissolves in 141.2 g of water in a coffee-cup calorimeter the temperature rises from 24.5 °C to 36.5 °C. Calculate the enthalpy change (in kJ/mol) for the solution process. AX(s) - A+ (aq) + X(aq) Assumptions for this calculation: The specific heat of the solution is the same as that of pure water (4.18 J/gK) The density of water = 1.000 g/mL. The liquid's final volume is not changed by...
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