When 1.00g of NaCl (MM 58.44 g/mol) is dissolved in 50.00g of water, the temperature drops...
Given 15.0 g of NaCl (MM of NaCl = 58.44 g/mol) is dissolved in 100.0 g of water: a. Determine the mass percent of this solution. b. Assume the density of the solution is 1.00 g/ml, calculate the molarity of the solution.
Calculate the Kf of a solvent when 50.0 g of NaCl (58.44 g/mol) is dissolved in 250.g of solvent and lowers the freezing point by 6.36°C. (Assume that the solute completely dissociates.) O 0.68 °C/m O 1.36 °C/m O 1.86 °C/m O 0.93 °C/m
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.
When 0.1002g o ammonium chloride is dissolved in 225mL of water in a constant pressure calorimeter, the temperature drops from 25.3 degrees celsius to 13.4 degrees celsius. What is the heat absorbed or released per gram and per mole of ammonium chloride.
Heat Capacity The temperature of an object increases by 29.0 °C when it absorbs 3693 J of heat. Calculate the heat capacity of the object. What is the formula for heat (9) that does not contain a variable for mass? Solve: Calculate the specific heat capacity of the object if the object weighs 331 grams. What is the formula for heat (g) that contains a specific heat capacity term? Solve: Calorimetry A researcher studying the nutritional value of a new...
when a solid dissolved in water, heat may be evolved or absorbed. the heat of dissolution can be determined using a coffee cup calorimeter. in the laboratory, a general chemsitry students finds that when 5.76 g of KBr(s) are dissolved in 115.30 g of water, the temperature of the solution drops from 22.18 to 20.00°C. the heat capacity of the calorimeter was determined in a separate experiment to be 1.61 J/°C. based on the students observation, calculate the enthalpy of...
1) A substance which, when dissolved in water, will conduct electricity is called a(n) _____. 2) For the following, use proper sig figs, do not include units, and do not place numbers in scientific notation. In order to make 1.00 liter of a 0.100 M solution of NaCl (MM = 58.44 g/mol) you will need to weigh out ____________ grams of NaCl.
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)
Part A: A calorimeter contains 26.0 mL of water at 13.0 ∘C . When 2.10 g of X (a substance with a molar mass of 49.0 g/mol ) is added, it dissolves via the reaction X(s)+H2O(l)→X(aq) and the temperature of the solution increases to 25.0 ∘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...
Part A A calorimeter contains 34.0 mL of water at 12.5 ∘C . When 1.50 g of X (a substance with a molar mass of 75.0 g/mol ) is added, it dissolves via the reaction X(s)+H2O(l)→X(aq) and the temperature of the solution increases to 25.5 ∘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...