Even before doing any calculations, you can look at the change in temperature measured for the water to say that you can expect the standard molar enthalpy of dissolution of MgCl2 to be Negative.
Since adding the magnesium chloride salt to the water results in a increase in temperature, you can conclude that the dissolution of magnesium chloride release heat from the surroundings → you're dealing with an exothermic reaction.
So, your strategy here will be to use the mass of the water, its specific heat, and its change in temperature to determine how much heat was absorbed by the dissolution reaction.
1. A student determines the heat of dissolution of solid magnesium chloride using a coffee-cup calorimeter...
A student determines the heat of dissolution of solid copper(II) sulfate using a coffee cup calorimeter of negligible heat capacity When 2.10 g of Cus04() is dissolved in 104.00 g of water, the temperature of the solution increases from 25.00 to 27.30 °C. Based on the student's observation, calculate the enthalpy of dissolution of CuSO4(s) in kJ/mol. Assume the specific heat of the solution is 4.184 RC AH dissolution - kJ/mol
A student determines the heat of dissolution of solid cobalt(II) sulfate using a coffee-cup calorimeter of negligible heat capacity. When 1.46 g of CoSO4(s) is dissolved in 116.00 g of water, the temperature of the solution increases from 25.00 to 26.58 °C. Based on the student's observation, calculate the enthalpy of dissolution of CoSO4(s) in kJ/mol. Assume the specific heat of the solution is 4.184 J/g°C. ΔHdissolution = kJ/mol
Use wie Nererences to access poi lallt values il leeueu IUI LIIS uuestivII. A student determines the heat of dissolution of solid cobalt(II) sulfate using a coffee-cup calorimeter of negligible heat capacity. When 1.63 g of CoSO4(s) is dissolved in 111.00 g of water, the temperature of the solution increases from 25.00 to 26.88 °C. Based on the student's observation, calculate the enthalpy of dissolution of CoSO4(s) in kJ/mol. Assume the specific heat of the solution is 4.184 J/g°C. AH...
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...
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 2.99 g of FeBrz(s) are dissolved in 102.70 g of water, the temperature of the solution increases from 25.90 to 29.34 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.59 J/°C....
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...
Part A: 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 2.79 g of NH4Cl(s) are dissolved in 106.00 g of water, the temperature of the solution drops from 23.17 to 21.34 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be...
Thermometer When a solid dissolves in water, heat may be evolved or absorbed. The heat of aissolution (dissolving) can be determined using a coffee cup calorimeter. Cardboard or Styrofoam lid In the laboratory a general chemistry student finds that when 11.13 g of CsBr(s) are dissolved in 114.50 g of water, the temperature of the solution drops from 25.61 to 22.35 °C The heat capacity of the calorimeter (sometimes refered to as the calorimeteγ constant) was determined in a separate...
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 13.20 g of Cs2SO4(s) are dissolved in 103.80 g of water, the temperature of the solution drops from 25.16 to 23.45 °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....
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...