A 0.75 gr sample of KCl is added to 35.0 gr H2O in a styrofoam cup and stirred until it dissolves. The temperature of the solution drops from 24.8 0C to 23.6 0C. What is the heat of solution of KCl expressed in kJ per mole of KCl? Specific heat capacity of KCl solution: c = 4.18 J/groC . Mol wt of KCl: 75 gr/mol   a. 30 J/mol b. 10 J / mol   c.  18 J /mol  d. 25 J/mol

Q: Adding 5.47 g of to 140 g of water in a coffee-cup calorimeter (with stirring to dissolve the salt)…

A: According to the question, we are adding 5.47 g of NH4NO3 to 140 g of water in a coffee-cup…

Q: When 2.00 grams of solid sodium hydroxide dissolves in 100.0 ml of water in a coffee-cup…

A: The energy released by NaOH when dissolving is equal to the heat absorbed by water to raise the…

Q: performs an experiment to determine the heat of reaction in a cold pack. A Styrofoam calorimeter…

A: When a salt is dissolved in the water, some energy may be gained or released.this energy is…

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

A: enthalpy of dissolution, ∆Hdissolution = mass (m) ×specific heat capacity(s) ×temperature change…

Q: When 1.81 g of zinc metal reacts with 100.00 g of 1.00M HCl in a coffee-cup calorimeter, the…

A: Zinc metal reacts with Concentrated HCl is an exothermic reaction(heat produced) thus temperature…

Q: A 1.6 g sample of solid NH4NO3 was added to 27.0 mL of water in a styrofoam cup (insulated from the…

A: The heat gain or loss can be determined by the relation q=mcΔT. Where q is the heat loss or gain, c…

Q: A metal object with a mass of 19.2 g is heated to 96 °C and then transferred to a calorimeter…

A:

Q: Consider the dissolution of CaCl2: CaCl2 (s) → Ca²+ (ag) +2 Cl¯(ag) AH=-81,5 kJ An 11.8-g sample of…

A: When a solute is dissolved in solvent to form a solution is called dissolution. It measures the…

Q: A reaction of 1.00 gram of NaOH with 100 mL of 1.0 M HCl in a styrofoam calorimeter causes a 10.5°C…

A: The mass (m) of the reaction solution is calculated as shown below where 100 mL is the total volume…

Q: A 100. mL sample of 0.100 M HC1(ag) solution is added to 100. mL of 0.200 M NH3(ag) in a coffee-cup…

A:

Q: CaO(s) reacts with water to form Ca(OH)2(aq). If 6.66 g CaO is combined with 99.84 g H2O in a coffee…

A: Given data,Mass of CaO=6.66gMass of water=99.84gInitial temperature=20oCFinal…

Q: When a 3.76 g sample of solid ammonium nitrate dissolves in 60.0 g of water in a Styrofoam-cup…

A: Interpretation-  To determine  ΔH (in kJ/mol NH4NO3) for the solution when 3.76 g sample of solid…

Q: 1. When 2.00 grams of solid sodium hydroxide dissolves in 100.0 ml of water in a coffee-cup…

A:

Q: How much heat (q) is needed to increased the temperature of 10 grams of water by 15°C? Water…

A: Given: The heat capacity of water, (C) = 4.184 J/g°C The mass of water, (m) = 10 g. The change in…

Q: Consider the dissolution of CaCl2: CaCl2 (s) → Ca+ (ag) + 2 Cl (aq) AH = -81.5 kJ An 11.8-g sample…

A: Calculate the heat released when 11.8 g of CaCl2 is dissolved:

Q: A 1.31-g sample of maleic acid (C4H4O4) is burned in a bomb calorimeter and the temperature…

A:

Q: alorimeter, with both substances at 23.0 °C. Calculate the final temperature of the solution. CaCl2…

A: First Calculate mass of Solution by Density×volume Then Calculate heat release in the Process. Q=…

Q: 0.81 g sample of KCl is added to 37.9 g H2O and stirred until KCl completely dissolves in a…

A: When KCl is mixed with water as we see temperature of the system decreases . Heat of solution is…

Q: Q8. 0.81 g sample of KCl is added to 37.9 g H;O and stirred until KCl completely dissolves in a…

A: Given data -                 mass of KCl = 0.81 g            mass of water = 37.9  g      initial…

Q: What was the mass of the reaction solution?

A: We have to find the heat absorbed

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

A: Heat of dissolution :-          The enthalpy of solution, enthalpy of dissolution, heat of…

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

A: Mass of CaCl2 dissolved = 2.02 gmass of water = 114 g = MInitial temperature of water = 23.70°CFinal…

Q: 5.04 x 10-3 mole of a compound is added to 41.0 g of water in a styrofoam cup and stirred until it…

A: Given,Mass of water = 41.0g.Temperature change = 23.4600C – 23.4200C…

Q: Need help with #4

A: The balanced reaction taking place is given as, => CuSO4 + 2 KOH  → K2SO4 + Cu(OH)2  Given:…

Q: 13. In an experiment, 30.0 g of metal was heated to 98.0°C and then quickly transferred to 50.0 g of…

A:

Q: A 1.200 g sample of ZnCO3 (s) dissolved in 40.0 mL of a dilute HCl solution (density = 1.10 g/mL) in…

A: The reactants are zinc carbonate and dilute hydrochloric acid.The balanced equation will be:

Q: A 50.0 mL solution of 1.2 M HCl at 24.1oC is mixed with 50.0 mL of 1.3 M NaOH, also at 24.1oC, in a…

A: HCl = 50.0 mL x 1.2 M = 60 mmol = 0.060 mol NaOH = 50.0 m X 1.3 M = 65 mmol = 0.065 mol here HCl and…

Q: A 222.5 mg sample of sucrose (C12H2½O11) is combusted in a bomb calorimeter. The temperature of the…

A: Mass of C12H22O11 =222.5 mg=0.2225 g Temperature change = 21.94-21.20=0.74 °C Heat capacity of…

Q: Adding 4.28 g of NH, NO, (s) to 150 g of water in a coffee-cup calorimeter (with stirring to…

A: Given : Mass of water = 150 g Mass of NH4NO3 added = 4.28 g Initial temperature of solution = 18.4…

Q: A 0.600 g sample of tristearin (C57H11O6), a common fat, is combusted in a bomb calorimeter…

A: Given: Mass of C57H11O6 = 0.600 g. Mass of water = 750.0 g. Heat capacity of calorimeter = 326 J/K.…

Q: When 50 mL of 0.100 M AgNO3 is combined with 50 mL of 0.100 M HCl in a coffee-cup calorimeter, the…

A: YOu need to know that both solution are aq and the volume is additive in nature. the Heat absorbed…

Q: 2CO (g) + O2(g) --> 2 CO2(g) delta H = -566 KJ endothermic or exothermic 2.8 g of CO let to react…

A: Combustion reaction are exothermic in Nature because energy released in combustion reaction

Q: A Snickers candy bar has 120 kcals attributed to its fat content. What is this energy in kilojoules…

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Q: During a neutralization reaction, 30.0 mL of 4.0 M HCl was mixed with 30.0 mL of 4.0 M NaOH in a…

A:

Q: A student transferred 50.0 ml 1.00 M HCl into a coffee-cup calorimeter, which had a temperature of…

A: By reaction of NaOH to HCl solution,  there is an increase in the temperature. Thus change in…

Q: 15. A 3.54 g sample of calcium chloride is dissolved in 346.8 mL of water using a coffee cup…

A: The question is based on the concept of calculation of enthalpy change for the reaction. the net…

Q: In the laboratory a student burns a 0.596-g sample of acetylsalicylic acid (C,H§O4) in a bomb…

A:

Q: [2] When 1.045 g of CaO is added to 50.0 ml of water at 22.0 °C in a coffee-cup calorimeter, the…

A: Heat release during reaction = heat gain by water and calorimeter.

Q: Calculate qrxn for the reaction that occurs when 25.0 mL of 1.00 M HCl are added to 25.0 mL of 1.00…

A: The volume of 1.00 M HCl added to the 25.0 mL of 1.00 M NaOH is 25.0 mL. The initial temperature is…

Q: When 25.0 mL of 1.00 M H2SO4 is added to 50.0 mL of 1.00 M NaOH in a coffee-cup calorimeter at 25°C,…

A: Given: Density= 1.00 g/mL The volume of H2SO4= 25.0 mL The volume of NaOH= 50.0 mL The concentration…

Q: When 6.54 grams of Zn is placed in 500.0 mL of 1.00 M CuSO4(aq) in a coffee cup calorimeter, it…

A: Given data,Mass of Zn=6.54gMolarity of CuSO4=1.00MVolume of CuSO4=500mL=0.5LTemperature…

Q: A 50 ml solution of 1.2M HCl at 24.1OC is mixed with 50 ml of 1.2M NaOH, also at 24.1oC, in a…

A: Given data Neutralization reaction :    NaOH(aq)   +   HCl(aq)   →    NaCl(aq)    +   H2O(l) Volume…

Q: The enthalpy of solution (∆H) of KOH is -57.6 kJ/mol. If 2.26 g KOH is dissolved in enough water to…

A:

Q: A 10.0-g sample of ammonium nitrate, NH4NO3, is added to 100.0 mL of water (density = 1.00 g/mL) in…

A: Given values: Mass of NH4NO3 = 10 g Density of water = 1 g/mL Inital temperature of calorimeter = 25…

Q: 9. Consider the reaction NH4NO; (s) → NH4+ (aq) + NO3- (aq). When 1.25 g of NH,NO3 dissolves in…

A:

Q: The enthalpy of solution (∆H) of KOH is -57.6 kJ/mol. If 5.61 g KOH is dissolved in enough water to…

A: Given: Volume of solution = 150.0 mL Density of solution = 1.02 g/mL. Enthalpy of solution of KOH =…

Q: Coffee cup calorimetry experiments can be used to obtain DHfo for magnesium oxide. To determine the…

A: In the given question we have to calculate the heat capacity of the calorimeter. by using the…