Ask Question, Ask an Expert

+61-413 786 465

info@mywordsolution.com

Ask Chemistry Expert

Imagine you are performing a calorimetry experiment using a constant-pressure calorimeter. First, you calibrate the calorimeter using the reaction of KOH with HCl (enthalpy = -56.2 kJ/mol). Then, you use the calorimeter to investigate the dissolution of solid ammonium nitrate (NH4NO3). The questions below involve your data (assume the density and specific heat capacity of your solutions is the same as liquid water).

a) A quantity of 85.0mL of 0.600M KOH is mixed with 85.0mL of 0.600M HCl in a coffee-cup calorimeter. The initial temperature of both solutions is 17.36 (degrees celsius), and the final temperature of the mixed solutions is 19.02 (degrees celsius). What is the heat capacity of the calorimeter?

b) A 3.52g sample of NH4NO3 is then dissolved in 80.0mL of water in the same calorimeter, and temperature of the solution changes from 17.54(degrees celcius) to 16.64 (degrees celcius). What is the enthalpy of solution of ammonium nitrate, in kJ/mol?

c) How does the value calculated in part (b) relate to the use of ammonium nitrate in instant cold packs (e.g.,in first aid kits). EXPLAIN BRIEFLY.

Chemistry, Academics

  • Category:- Chemistry
  • Reference No.:- M92166707
  • Price:- $15

Priced at Now at $15, Verified Solution

Have any Question?


Related Questions in Chemistry

The threshold wavelength for the photoelectric effect for

The threshold wavelength for the photoelectric effect for silver is 262nm. What is the work function for silver and what is the maximum KE of an emitted electron if the incident light has a wavelength of 212nm?

You will have a 500ml solution of salt water from this you

You will have a 500mL solution of salt water. From this you will take 10.0mL and place it on a balance. You find that the 10.0mL solution has a mass of 12.5 g. What is the density of the 500mL of salt water solution in g ...

If liquid is at or above its flash point the flame spread

If liquid is at or above it's flash point, the flame spread rate is fast, and the entire pool is engulfed within seconds. In such a case, the liquid is already evaporating sufficiently to reach the lower flammability lim ...

What is the mass of naoh present in grams given that a 100

What is the mass of NaOH present in grams, given that a 100. mL solution has a concentration of 0.125 M?

Interpretation of reactions by ionic type equations aqueous

Interpretation of Reactions by Ionic Type Equations. Aqueous solutions of the following substances or their mixtures with water if they are only slightly soluble, are mixed. Write first  the conventional equation , secon ...

The reaction of solid dimethylhydrazine ch32n2h2 and

The reaction of solid dimethylhydrazine ((CH3)2N2H2) and liquefied dinitrogen tetroxide (N2O4) has been investigated as a rocket fuel; the reaction produces gaseous carbon dioxide (CO2) nitrogen (N2) and water vapor (H2O ...

How is vacuum filtration completing the purification of

How is vacuum filtration completing the purification of your sample? Where are the impurities at this point? For a recrystallization lab in organic chemistry

Insoluble pbbr2snbspnbspprecipitates when solutions of

Insoluble PbBr2(s)  precipitates when solutions of Pb(NO3)2(aq) and NaBr(aq) are mixed. Pb(NO3)2(aq) + 2NaBr(aq) ---> PbBr2(s) + 2NaNO3(aq) ΔrH = ? To measure the enthalpy change, 350. mL of 0.50 M Pb(NO3)2(aq) and 350. ...

A sample of a substance containing only c h and n is burned

A sample of a substance (containing only C, H, and N) is burned in oxygen.  8.696 g  of  CO 2 ,  2.225 g  of  H 2 O  and  4.446 g  of  NO  are the sole products of combustion.  What is the empirical formula of the compou ...

The molecular weight of an unknown gas was measured by an

The molecular weight of an unknown gas was measured by an effusion experiment. It was found that it took 64 seconds for the gas to effuse, whereas nitrogen required 48 seconds. The molecular mass of the gas is ?

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As