Homework Answers
The right answer is -1.96 kJ.
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8 4 points When a 0.456 g sample of salt is dissolved into water in a...
Question 7 of 16 > In a calorimeter, 1.045 g of an unknown salt is dissolved...
Question 7 of 16 > In a calorimeter, 1.045 g of an unknown salt is dissolved in 50.0 mL of water at 25.0 'C, and the temperature of the water increases to 32.3°C. Assuming that the specific heat of the solution is 4.184 J/g °C) and that the calorimeter itself absorbs a negligible amount of heat, calculate the AH in kJ for dissolving the salt in water. O 31.9 J -1.56 kJ 1.561 -1560 kJ O -31.9 O 1560 kJ...
A 7.41 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 15.00...
A 7.41 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 15.00 g water in a coffee cup calorimeter. Before placing the sample in the water, the temperature of the salt and water is 23.72 degrees celsius. After the salt has completely dissolved, the temperature of the solution is 28.54 degrees celsius. A) Was the dissolution process endothermic or exothermic? B) What is the heat for the dissolution reaction?
The salt sodium perchlorate is soluble in water. When 9.07 g of NaClO4 is dissolved in...
The salt sodium perchlorate is soluble in water. When 9.07 g of NaClO4 is dissolved in 103.00 g of water, the temperature of the solution decreases from 25.00 to 22.70 °C. Based on this observation, calculate the enthalpy of dissolution of NaClO4 (in kJ/mol). Assume that the specific heat of the solution is 4.184 J/g °C and that the heat absorbed by the calorimeter is negligible. ΔHdissolution kJ/mol =
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution...
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. Thermometer In the laboratory a general chemistry student finds that when 9.66 g of CSCI(S) are dissolved in 106.80 g of water, the temperature of the solution drops from 22.55 to 19.99 °C. Cardboard or Styrofoam lid The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate...
When 3.90 g of cesium perchlorate (CsClO4) is dissolved in 112 g of water in a...
When 3.90 g of cesium perchlorate (CsClO4) is dissolved in 112 g of water in a styrofoam calorimeter of negligible heat capacity, the temperature drops from 25.00 to 22.93 °C. Based on this observation, calculate q for the water and ΔH° for the process, assuming that the heat absorbed by the salt is negligible. CsClO4(s) Cs+(aq) + ClO4- (aq) The specific heat of water is 4.184 J °C-1 g-1. Give the answers in kJ. qH2O = kJ ΔH° = kJ
When 3.92 g of ammonium perchlorate (NH4ClO4) is dissolved in 119 g of water in a...
When 3.92 g of ammonium perchlorate (NH4ClO4) is dissolved in 119 g of water in a styrofoam calorimeter of negligible heat capacity, the temperature drops from 25.00 to 22.64 °C. Based on this observation, calculate q for the water and ΔH° for the process, assuming that the heat absorbed by the salt is negligible. NH4ClO4(s) NH4+(aq) + ClO4- (aq) The specific heat of water is 4.184 J °C^-1 g^-1. Give the answers in kJ. qH2O = ______ kJ ΔH° =...
The salt cesium chloride is soluble in water. When 11.9 g CsCl is dissolved in 117.00 g water, th...
The salt cesium chloride is soluble in water. When 11.9 g CsCl is dissolved in 117.00 g water, the temperature of the solution decreases from 25.00 °C to 22.56 °C. Based on this observation, calculate the dissolution enthalpy, ΔdissH, of CsCl. Assume that the specific heat capacity of the solution is 4.184 J g-1 °C-1 and that the energy transfer to the calorimeter is negligible. ΔdissH = kJ/mol
The salt cesium chloride is soluble in water. When 11.9 g CsCl is dissolved in 117.00...
The salt cesium chloride is soluble in water. When 11.9 g CsCl is dissolved in 117.00 g water, the temperature of the solution decreases from 25.00 °C to 22.56 °C. Based on this observation, calculate the dissolution enthalpy, ΔdissH, of CsCl. Assume that the specific heat capacity of the solution is 4.184 J g-1 °C-1 and that the energy transfer to the calorimeter is negligible. ΔdissH = kJ/mol
when a 7.00 g sample of KSCN is dissolved in water in a calorimeter that has...
when a 7.00 g sample of KSCN is dissolved in water in a calorimeter
that has a total he capacity of 4.36 kJ. K^-1, the temperature
decreases by .400 K. calculate the molar heat of solution of KSCN.
Resources Give Up?9 When a 7.00 g sample of KSCN is dissolved in water in a calorimeter that has a total heat capacity of 4.36 kJ .K-, the decreases by 0.400 K. Calculate the molar heat of solution of KSCN kJ/mol TOOLS...
, the When a 4.00 g sample of KBr is dissolved in water in a calorimeter...
, the When a 4.00 g sample of KBr is dissolved in water in a calorimeter that has a total heat capacity of 1.49 kJ · K temperature decreases by 0.450 K. Calculate the molar heat of solution of KBr. AH soln = kJ/mol
Question 7 of 16 > In a calorimeter, 1.045 g of an unknown salt is dissolved in 50.0 mL of water at 25.0 'C, and the temperature of the water increases to 32.3°C. Assuming that the specific heat of the solution is 4.184 J/g °C) and that the calorimeter itself absorbs a negligible amount of heat, calculate the AH in kJ for dissolving the salt in water. O 31.9 J -1.56 kJ 1.561 -1560 kJ O -31.9 O 1560 kJ...
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. Thermometer In the laboratory a general chemistry student finds that when 9.66 g of CSCI(S) are dissolved in 106.80 g of water, the temperature of the solution drops from 22.55 to 19.99 °C. Cardboard or Styrofoam lid The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate...
when a 7.00 g sample of KSCN is dissolved in water in a calorimeter
that has a total he capacity of 4.36 kJ. K^-1, the temperature
decreases by .400 K. calculate the molar heat of solution of KSCN.
Resources Give Up?9 When a 7.00 g sample of KSCN is dissolved in water in a calorimeter that has a total heat capacity of 4.36 kJ .K-, the decreases by 0.400 K. Calculate the molar heat of solution of KSCN kJ/mol TOOLS...
, the When a 4.00 g sample of KBr is dissolved in water in a calorimeter that has a total heat capacity of 1.49 kJ · K temperature decreases by 0.450 K. Calculate the molar heat of solution of KBr. AH soln = kJ/mol
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