When 16.3 g KOH is dissolved in 94.3 g of water in a coffee-cup calorimeter, the...
When 16.3 g KOH is dissolved in 94.3 g of water in a coffee-cup calorimeter, the temperature rises from 18.9 °C to 30.16 °C. What is the enthalpy change per gram (in J/g) of KOH dissolved in the water? Assume that the solution has a specific heat capacity of 4.18 J/g×K. Water has a density of 1.00 g/ml. Be sure to enter the correct sign (+/-). Enter to 1 decimal place.
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When 16.3 g KOH is dissolved in 94.3 g of water in a coffee-cup
calorimeter, the...
When 27.0 mL of 0.500 M H2SO4 is added to 27.0 mL of 1.00 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature...
When 27.0 mL of 0.500 M H2SO4 is added to 27.0 mL of 1.00 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate ΔH of this reaction. (Assume that the total volume is the sum of the individual volumes and that the density and specific heat capacity of the solution are the same as for pure water.) (d for water = 1.00 g/mL; c for water = 4.184 J/g·°C.) Answer: ______ kJ/mol H2O
In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently use...
In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used to determine the specific heat of a solid, or to measure the energy of a solutiorn phase reaction. Thermometer Stirring rod A student heats 63.92 grams of iron to 98.03 °C and then drops it into a cup containing 75.92 grams of water at 24.47 °C. She measures the final temperature to be 30.66 °C The heat capacity of the calorimeter (sometimes referred to as the...
When 1.00 g of CaCl2 is added to 50.0 g of water in a coffee-cup calorimeter,...
When 1.00 g of CaCl2 is added to 50.0 g of water in a coffee-cup calorimeter, it dissolves according to the following eqn: CaCl2 (s) Ca2 (aq) + 2Cl (aq) The temperature of the solution rises from 25.00°C to 28.51 °C. Assuming that all the heat flow involved in the reaction is transferred to the water, calculate q Also, assume that the csoln is equal to cwater Which is 4.18 J/g °C
In a coffee cup calorimeter, 50.0 mL of 1.5 M NaOH and 60.0 mL of 1.4...
In a coffee cup calorimeter, 50.0 mL of 1.5 M NaOH and 60.0 mL of 1.4 M HCl are mixed at 25.0oC. After the reaction, the temperature is 34.1 oC. Assuming all solutions have a density of 1.00 g/cm3 and a specific heat capacity of 4.18 J/oC g, what is the enthalpy change (kJ) for the reaction?
A 2.490-g sample of cadmium metal completely reacts when placed in a coffee cup calorimeter that...
A 2.490-g sample of cadmium metal completely reacts when placed in a coffee cup calorimeter that contains 75.0 mL of a dilute sulfuric acid solution (aqueous) (density of 1.03 g/mL) to produce hydrogen gas and dissolved cadmium sulfate. The chemical reaction is exothermic causing the temperature of the resulting aqueous solution to change from 21.5oC to 32.5oC. Write a balanced chemical equation for the chemical reaction that occurs. Find the enthalpy change, in kJ/mol, for the chemical reaction, assuming the specific...
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student...
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 0.72 g of KOH(s) are dissolved in 110.70 g of water, the temperature of the solution increases from 25.60to 27.23 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.60 J/°C. Based...
In a coffee-cup calorimeter, 11.0-g sample of solid CaCℓ2 is dissolved in 125 g of water...
In a coffee-cup calorimeter, 11.0-g sample of solid CaCℓ2 is dissolved in 125 g of water at 25.0 oC. The temperature in the calorimeter is measured to be 39.2 oC when the dissolution of CaCℓ2 is completed. Assuming that the specific heat of solution is equal to that of water, i.e., 4.184 J/g oC, calculate the heat of solution of CaCℓ2 in water, in kJ/mol.
In a coffee-cup calorimeter, 11.0-g sample of solid CaCℓ2 is dissolved in 125 g of water...
In a coffee-cup calorimeter, 11.0-g sample of solid CaCℓ2 is dissolved in 125 g of water at 25.0 oC. The temperature in the calorimeter is measured to be 39.2 oC when the dissolution of CaCℓ2 is completed. Assuming that the specific heat of solution is equal to that of water, i.e., 4.184 J/g oC, calculate the heat of solution of CaCℓ2 in water, in kJ/mol.
In a coffee cup calorimeter, 100.0 mL of 1.00 M NaOH and 200.0 mL of 0.80...
In a coffee cup calorimeter, 100.0 mL of 1.00 M NaOH and 200.0 mL of 0.80 M HCl are mixed at 25.0oC. After the reaction, the temperature is 29.5 oC. Assuming all solutions have a density of 1.00 g/cm3 and a specific heat capacity of 4.18 J/oC g, what is the enthalpy change (kJ) for the balanced reaction? HCl(aq) + NaOH(aq) => NaCl(aq) + H2O(l)
In a coffee-cup calorimeter, 11.0-g sample of solid CaCℓ2 is dissolved in 125 g of water...
In a coffee-cup calorimeter, 11.0-g sample of solid CaCℓ2 is dissolved in 125 g of water at 25.0 oC. The temperature in the calorimeter is measured to be 39.2 oC when the dissolution of CaCℓ2 is completed. Assuming that the specific heat of solution is equal to that of water, i.e., 4.184 J/g oC, calculate the heat of solution of CaCℓ2 in water, in kJ/mol. final answer is :-29.6
In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used to determine the specific heat of a solid, or to measure the energy of a solutiorn phase reaction. Thermometer Stirring rod A student heats 63.92 grams of iron to 98.03 °C and then drops it into a cup containing 75.92 grams of water at 24.47 °C. She measures the final temperature to be 30.66 °C The heat capacity of the calorimeter (sometimes referred to as the...
When 1.00 g of CaCl2 is added to 50.0 g of water in a coffee-cup calorimeter, it dissolves according to the following eqn: CaCl2 (s) Ca2 (aq) + 2Cl (aq) The temperature of the solution rises from 25.00°C to 28.51 °C. Assuming that all the heat flow involved in the reaction is transferred to the water, calculate q Also, assume that the csoln is equal to cwater Which is 4.18 J/g °C
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