Question

I really need help with a chemistry lab!!! will give medal

Answer 1

6.03: Calorimetry


Data and Observations:
Part I:
Insert a complete data table, including appropriate significant figures and units, in the space below. Also include any observations that you made over the course of part I. (4 points)


Metal Name Zn
Mass of Metal 36.828g
Volume of water 26.100mL
Initial temp. in calorimeter 25.4c
Initial temp. in beaker 100.7`c
Final temp. of mixture 34.8c


Part II:
Insert a complete data table, including appropriate significant figures and units, in the space below. Also include any observations that you made over the course of part II. (4 points)


Unknown (A,B,C,D) B
Mass of Metal 20.769g
Volume of water 24.810 mL
Initial temp. in calorimeter 23.1c
Initial temp. in beaker 100.4c
Final temp. of mixture 32.2c



Calculations:
Show your work and write a short explanation with each calculation.

32.2



2. Calculate the specific heat of the metal. (4 points)

q surroundings = -q system

C = q/(m × Δt)







Part II:
1. Calculate the energy change (q) of the surroundings (water). We can assume that the specific heat capacity of water is 4.18 J/ (g · °C), and the density of water is 1.00 g/mL. (4 points)

q = m × c × Δt







2. Calculate the specific heat of the metal. (4 points)

q surroundings = -q system

C = q/(m × Δt)







Conclusion:

1. Use the given specific heat capacity values below to calculate the percent error of the experimental specific heat capacity that you determined in part I of the lab. (2 points)

Known Specific Heat Values: Iron: 0.444 J/g°C, Zinc: 0.390 J/g°C, Copper: 0.385 J/g°C, Aluminum: 0.900 J/g°C


Percent Error = × 100





2. Using the experimental specific heat capacity value that you determined in part II of the lab, what is the most probably identity of the metal that you examined? (2 points)



3. Assuming that is the identity of the metal, determine the percent error of your calculated specific heat capacity value. (2 points)

Metal Specific Heat Capacity
Nickel 0.440
Tin 0.210
Silver 0.237
Magnesium 0.140
Calcium 0.650
Mercury 0.140



Percent Error = × 100


Metal you examined:

Experimental specific heat capacity:

Metal identity:

Known specific heat capacity value:

4. In complete sentences, describe three sources of experimental error that could occur with this type of calorimetry lab. Explain, in detail, the effect that each specific error would have on the calculated specific heat capacity values. (5 points)

Answer 2

@mathstudent55

Answer 3

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Answer 4

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Answer 5

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Answer 6

This is a lot, why don't we start with what it is you REALLY don't understand about this long-winded problem. We cannot do your assignments for you.

Answer 7

This is certainly too much to ask in one question. I suggest you ask them separately, one at a time.