An unknown compound has a molar mass of 245 g/mol and an enthalpy of solvation of...
An unknown compound has a molar mass of 245 g/mol and an enthalpy of solvation of 13 kJ/mol. What is the final temperature of 273 mL of water with an initial temperature of 55 °C, if a student completely dissolves 19 grams of the unknown compound? (heat capacity of water = 4.18 J/g °C)
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An unknown compound has a molar mass of 245 g/mol and an
enthalpy of solvation of...
The molar mass of solid is 110.98 g/mol PART IV MOLAR MASS OF SOLID Mass of...
The molar mass of solid is 110.98 g/mol
PART IV MOLAR MASS OF SOLID Mass of Calorimeter (g) 10%1841 991565p S10005 Mass of Calorimeter plus water (g) Mass of water (g) Mass of unknown solid (g) alig'c 28.3 Initial temperature (°C) Final temperature (C) Temperature change (AT) Heat, q (kJ) Heat of solution per gram of solid (kJ/g) Heat of solution per mole of compound (kJ/mol) DATA ANALYSIS 1. Calculate q solution (Cs for water is 4.184 J/g°C) 2. Identify...
Compound Δ Hrxn (kJ/mol) NH4NO3 + 25.7 KCl + 17.2 NaOH -44.5 KOH -57.6 You are...
Compound Δ Hrxn (kJ/mol) NH4NO3 + 25.7 KCl + 17.2 NaOH -44.5 KOH -57.6 You are given 6.9 grams of an unknown salt. You dissolve it in 56.5 mL of water. As the salt dissolves, the temperature of the solution changes from an initial temperature of 28.9°C to a final temperature of 22.9°C. Based on the chart of ΔH values and the temperature change, you can determine which salt you have. What is the temperature change? Δ T = o C...
A calorimeter contains 29.0 mL of water at 14.0 ∘C . When 1.30 g of X (a substance with a molar mass of 61.0 g/mol ) is...
A calorimeter contains 29.0 mL of water at 14.0 ∘C . When 1.30 g of X (a substance with a molar mass of 61.0 g/mol ) is added, it dissolves via the reaction X(s)+H2O(l)→X(aq) and the temperature of the solution increases to 27.0 ∘C . Calculate the enthalpy change, ΔH, for this reaction per mole of X. Assume that the specific heat of the resulting solution is equal to that of water [4.18 J/(g⋅∘C)], that density of water is 1.00...
A metal with a molar mass of 192.22 g mol-1 and an atomic radius of 1.80 x 102 pm packs in a face...
A metal with a molar mass of 192.22 g mol-1 and an atomic radius of 1.80 x 102 pm packs in a face centred cubic structure. Calculate the density of the metal in units of g cm 3 A mineral has the unit cell shown below contains nitrogen,lithium and boron. Determine the empirical formula of the mineral. B atoms are the nine smallest spheres on the corners and in the body - centre Li atoms are the fourteen medium spheres...
D 2. When 7.29 g hydrochloric acid (36.46 g/mol) and 8.00 g sodium hydroxide (40.00 g/mol)...
D 2. When 7.29 g hydrochloric acid (36.46 g/mol) and 8.00 g sodium hydroxide (40.00 g/mol) are mixed in 250.0 g water, the temperature of the solution increases by 10.3°C. Assume that the heat capacity of the solution is 4.18 J/(g °C). What is the molar enthalpy of neutralization of HCl by NaOH? 57.1 kJ/mol -57.1 kJ/mol 53.8 kJ/mol -53.8 kJ/mol 28.6 kJ/mol
TC01H02 Solid calcium hydroxide weighing 1.9984 g (molar mass = 74.09 g mor') is dissolved in...
TC01H02 Solid calcium hydroxide weighing 1.9984 g (molar mass = 74.09 g mor') is dissolved in 100.0 mL of 1.000 mol/L HCl in an open calorimeter which has a heat capacity of 15.87 JK! The initial temperature of the Ca(OH)2 and HCl is 19.14 °C and and the temperature of the solution is 24.20 °C at the completion of the reaction. Density of 1.000 mol/L HCl = 1.015 g/mL. Heat capacity of the final solution = 3.950 JK'g? Use the...
A coffee cup calorimeter was used to measure the heat of solution, the change in enthalpy...
A coffee cup calorimeter was used to measure the heat of solution, the change in enthalpy that occurs when a solid dissolves in water. A 10.0 g sample of an ionic compound with a molar mass of 110.0 g/mol was added to a sample of deionized water to produce 60.0 grams of solution. After stirring and dissolving the solid, the temperature was found to change from 25.00 C to 23.83 C. Calculate the enthalpy of solution, AH soln per mole...
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...
water has a molar heat capacity of 75.38 J/(mol 12. Water has a molar heat capacity...
water has a molar heat capacity of 75.38 J/(mol
12. Water has a molar heat capacity of 75.38 J/(mol x °C) and its vaporization enthalpy at 100°C is 40.7 kJ/mol. How much energy is needed to convert 36 g liquid H20 at 70.0°C to steam at 100°C? A) 85.9 kJ B) 126 kJ C) 77.6 kJ D) 81.4 kJ E) 45.2 kJ
A coffee cup calorimeter was used to measure the heat of solution, the change in enthalpy...
A coffee cup calorimeter was used to measure the heat of solution, the change in enthalpy that occurs when a solid dissolves in water. A 10.0 g sample of an ionic compound with a molar mass of 190.0 g/mol was added to a sample of deionized water to produce 60.0 grams of solution. After stirring and dissolving the solid, the temperature was found to change from 25.00 °C to 23.86 °C. Calculate the enthalpy of solution, AH coln, per mole...
The molar mass of solid is 110.98 g/mol
PART IV MOLAR MASS OF SOLID Mass of Calorimeter (g) 10%1841 991565p S10005 Mass of Calorimeter plus water (g) Mass of water (g) Mass of unknown solid (g) alig'c 28.3 Initial temperature (°C) Final temperature (C) Temperature change (AT) Heat, q (kJ) Heat of solution per gram of solid (kJ/g) Heat of solution per mole of compound (kJ/mol) DATA ANALYSIS 1. Calculate q solution (Cs for water is 4.184 J/g°C) 2. Identify...
A metal with a molar mass of 192.22 g mol-1 and an atomic radius of 1.80 x 102 pm packs in a face centred cubic structure. Calculate the density of the metal in units of g cm 3 A mineral has the unit cell shown below contains nitrogen,lithium and boron. Determine the empirical formula of the mineral. B atoms are the nine smallest spheres on the corners and in the body - centre Li atoms are the fourteen medium spheres...
D 2. When 7.29 g hydrochloric acid (36.46 g/mol) and 8.00 g sodium hydroxide (40.00 g/mol) are mixed in 250.0 g water, the temperature of the solution increases by 10.3°C. Assume that the heat capacity of the solution is 4.18 J/(g °C). What is the molar enthalpy of neutralization of HCl by NaOH? 57.1 kJ/mol -57.1 kJ/mol 53.8 kJ/mol -53.8 kJ/mol 28.6 kJ/mol
TC01H02 Solid calcium hydroxide weighing 1.9984 g (molar mass = 74.09 g mor') is dissolved in 100.0 mL of 1.000 mol/L HCl in an open calorimeter which has a heat capacity of 15.87 JK! The initial temperature of the Ca(OH)2 and HCl is 19.14 °C and and the temperature of the solution is 24.20 °C at the completion of the reaction. Density of 1.000 mol/L HCl = 1.015 g/mL. Heat capacity of the final solution = 3.950 JK'g? Use the...
A coffee cup calorimeter was used to measure the heat of solution, the change in enthalpy that occurs when a solid dissolves in water. A 10.0 g sample of an ionic compound with a molar mass of 110.0 g/mol was added to a sample of deionized water to produce 60.0 grams of solution. After stirring and dissolving the solid, the temperature was found to change from 25.00 C to 23.83 C. Calculate the enthalpy of solution, AH soln per mole...
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...
water has a molar heat capacity of 75.38 J/(mol
12. Water has a molar heat capacity of 75.38 J/(mol x °C) and its vaporization enthalpy at 100°C is 40.7 kJ/mol. How much energy is needed to convert 36 g liquid H20 at 70.0°C to steam at 100°C? A) 85.9 kJ B) 126 kJ C) 77.6 kJ D) 81.4 kJ E) 45.2 kJ
A coffee cup calorimeter was used to measure the heat of solution, the change in enthalpy that occurs when a solid dissolves in water. A 10.0 g sample of an ionic compound with a molar mass of 190.0 g/mol was added to a sample of deionized water to produce 60.0 grams of solution. After stirring and dissolving the solid, the temperature was found to change from 25.00 °C to 23.86 °C. Calculate the enthalpy of solution, AH coln, per mole...
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