When a 2.66-g sample of solid ammonium chloride dissolves in 37.8 g of water in a coffee-cup calorimeter (see above figure) the temperature falls from 21.00 oC to 16.68 oC. Calculate H in kJ/mol NH4Cl for the solution process. NH4Cl(s) NH4+(aq) + Cl-(aq) The specific heat of water is 4.18 J/g-K. Hsolution = kJ/mol NH4Cl.

Q: When a 9.55-g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup…

A: Given : mass of NaOH = 9.55 g Mass of water = 100 g The heat absorbed by the reaction is given by  Q…

Q: When a 2.66-g sample of solid ammonium chloride dissolves in 37.8 g of water in a coffee-cup…

A: The heat of a reaction or change in enthalpy of a reaction is associated with the amount of heat…

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: When a 4.25-g sample of solid sodium nitrate dissolves in 50.0 g of water in a coffee-cup…

A: The mass of sodium nitrate is = 4.25 g The mass of water is = 50.0 g The mass of solution is =…

Q: mass of the substance

A:

Q: In a calorimeter, you mix together 31.0 grams of a solution of acid and 30.0 grams of a solution of…

A: Neutralization reaction between acid and base is an exothermic reaction. The heat released during…

Q: When a 4.25-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup…

A: Given,Mass of sample = 4.25-gInitial temperature = 22 degree CelsiusFinal temperature = 16.9 degree…

Q: If the specific heat of methanol is 2.51 J/K-g, how many joules are necessary to raise the…

A: The formula of heat is given by: q = m×c×∆THere, m = massc = specific heat∆T = change in temperature

Q: A 10-g solid was heated in a test tube to 100°C in boiling water and added to the coffee-cup…

A:

Q: The ΔH for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol. When…

A: To solve this problem, first calculate the q for reaction by using formula q = n∆H. Using q value…

Q: Limestone, CaCO3, when subjected to a temperature of 900°C in a kiln, decomposes to calcium oxide…

A:

Q: Consider the thermochemical equation for the combustion of acetone (C3H,O), the main ingredient in…

A: Solution :      The heat of reaction is defined as the amount of heat absorbed or released during a…

Q: The process of dissolving ammonium nitrate,NH4NO3, in water is an endothermic process. a)what is…

A: Given Mass of ammonium nitrate = 4.40 g Mass of water = 100 g Heat absorbed by NH4NO3 = 3.30*102 J/g…

Q: The AH for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol. When…

A: Given that : ∆Hsolution=44.4 kJ/molThe mass of NaOH=10.9 gThe mass of water=253 gInitial…

Q: 1) Glucose, C6H12O6 (MM = 180 g/mol), is converted into ethyl alcohol, C2H5OH(l) in the fermentation…

A:

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: In a calorimeter, 150 mL of 0.5 mol/L barium chloride is mixed with 150 mL of 0.5 mol/L sodium…

A: The solution is given below -

Q: When a 7.94-g sample of solid potassium chlorate dissolves in 46.3 g of water in a coffee-cup…

A: Mass of sample = 7.94 g  Mass of water = 46.3 g Initial temperature = 23.00 °C Final temperature =…

Q: When a 5.12-g sample of solid sodium nitrate dissolves in 58.0 g of water in a coffee-cup…

A: First of all calculate the heat involved in the process by the given amount (moles) of solute by…

Q: A chemical reaction is carried out in a 30.0 g calorimeter. The calorimeter has a specific heat of…

A: Here the heat released by the reaction is absorbed by both the calorimeter and water inside the…

Q: 5) Ethyl alcohol is produced by the fermentation of glucose, C6H12O6. C6H1206(s)→2 C2H5OH(/) +2…

A:

Q: 4. Gasohol contains ethanol (C2H5OH), which when burned reacts with oxygen to produce water and…

A: A reaction is exothermic if heat is released ( ΔH is negative ) and reaction is endothermic if heat…

Q: When 25.0 g hydrogen gas react according to the following reaction, how many kJ of heat are released…

A: Given thermochemical equation is  CO(g) + 3H2(g)   --> CH4(g) + H2O (g)  ;  ∆Hrxn = – 206 kJ Mass…

Q: 9) The AH for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol.…

A: Given Enthalphy  = 44.4 KJ /mol Mass of NaOH = 13.9 g Mass of H2O = 250 g Initial temperature = 230C

Q: A 5.6 g bullet travelling at 650 m/s is stopped upon impact with a pool of water. How much heat is…

A: We will use the principle of conservation of energy. Total initial energy = Total final energy Here…

Q: The thermite reaction in which aluminum metal reacts with iron(III) oxide to produce a spectacular…

A: The reaction is as follows: 2Al(s)+Fe2O3(s)--------->Al2O3(s)+2Fe(l).          ΔH =  -202.9 kcal.…

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

A: Given: mass of zinc = 1.81 g mass of HCl = 100.00 g Initial temperature = 20.8 oC Final temperature…

Q: When 12.29 g of finely divided brass at 95.0 °C is quickly stirred into 40.00 g of water at 22.0 °C,…

A: Given, Mass of brass= 12.29 g Temperature = 95.0°C Mass of water = 40.00 g the temperature of water…

Q: When 200.0 mL of 0.862 M HCI is mixed with 200.0 mL of 0.431 M Ba(OH)2 in a coffee cup calorimeter,…

A:

Q: Limestone, CaCO3, when subjected to a temperature of 900°C in a kiln, decomposes to calcium oxide…

A: The decomposition reaction of limestone CaCO3 is as follows:   CaCO3(s) → CaO(s) + CO2(g) The…

Q: A cup contains 195 g195 g of coffee at 99.3 °C99.3 °C. Suppose 63.4 g63.4 g of ice is added to the…

A: Given data mass of coffee = 195 g initial temperature of coffee = 99.3 oC mass of ice added = 63.4 g…

Q: During an experiment, a student adds 1.05 g of calcium metal to 200.0 mL of 0.75 M HCI. The student…

A:

Q: Assume that the specific heat of the solution is the same as that of pure water. 5.54 (a) When a…

A: Given: Mass of solution= 60g  Mass of sample = 3.88g Initial temperature = 230C Final temperature =…

Q: Methanol is an ingredient in windshield washer fluid and ingesting as little as 4 mL can cause…

A: Carbon monoxide and hydrogen react to form methanol, the balanced chemical equation is given below:…

Q: The specific heat capacity of a particular type of pasta is 1.8 Jg·◦C. Suppose you toss 340 grams of…

A: A numerical problem based on heat energy released, which is to be accomplished.

Q: In a calorimetric experiment, 6.24 g of lithium hydroxide, LIOH, was dissolved in water. The…

A:

Q: calculate the heat (in J) of the reaction if 50.0 mL of HCl is added to 50.0 mL of NaOH in a…

A: When an acid and base react to form a salt and water and heat evolved in resultant solution is…

Q: O THERMOCHEMISTRY Using Hess's Law to calculate net reaction enthalpy Lindsay Dimethyl ether, a…

A: Applying concept of Hess law.

Q: When a  brass black was dropped into a 124-gram water, the water temperature increased from 21.0°C…

A: Given,Mass of water, mwater = 124 gMass of brass, mbrass = 77.764 gInitial temperature of water =…

Q: A solid silver coin (specific heat = 235 J/kg°C) is heated to a temperature of 58.0°C and added to…

A: Given data Silver coin Specific heat = 235 J/kg °CInitial Temperature = 58 °CFinal Temperature = 27…

Q: During an experiment, a student adds 0.339 g of calcium metal to 100.0 mL of 2.05 M HCI. The student…

A: Given data,Mass of Ca=0.339gMolarity of HCl=2.05MVolume of HCl=100mL=0.1LVolume of…

Q: A 3.59°C increase in temperature occurs when a 0.232 g sample of benzoic acid (C7H6O2) is combusted…

A: Heat of combustion if benzoic acid = -26.37 KJ/mol Mass of benzoic acid = 0.232 g Heat releases =…

Q: The air within a piston equipped with a cylinder absorbs 545 J of heat and expands from an initial…

A: The work done against a constant external pressure is given by  W = -Pext∆V  Pext = constant…

Q: When a 6.50 g sample of solid NaOH dissolves in 100.0g of water in a coffee-cup calorimeter, the…

A: Given information: Mass of sample = 6.50 g Mass of water = 100.0 g Initial temperature = 21.6 °C…

Q: How much energy (in kJ) is required to change the temperature of 1.00 kg Fe from 25.0 °C to 1515 °C?…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: When 50.0 g of 0.200 M NaCl(aq) at 24.1 °C is added to 100.0 g of 0.100 M AgNO3(aq) at 24.1 °C in a…

A:

Q: In an experiment, 138 g of graphite is heated to 90.0°C and then quickly transferred to 150.0 g of…

A: Since whatever heat is lost by graphite, is used by the water and calorimeter. Hence heat lost by…

Q: Which of the following (with specific heat capacity provided) would show the smallest temperature…

A: