Initial Final Mass of Marshmallow (g) 7.1g 6.3g Temperature (oC) 29.1 oC 32.2 oC 1. Calculate...
|
Initial |
Final |
|
|
Mass of Marshmallow (g) |
7.1g |
6.3g |
|
Temperature (oC) |
29.1 oC |
32.2 oC |
1. Calculate the number of Joules released per gram of marshmallow burned. Show all work. Do this as follows:
Find the T of water = Tfinal- Tinitial
T of water = 3.1oC
b. Find the Joules absorbed by the water using the formula below. Show all work.
Joules = (10mL water) x (1.00g)/ mL x (3.1oC) x (4.184 joules)/goC
The density of water is 1.00 g/mL, and the specific heat capacity Csp,water= 4.184 J/goC
c. READ CAREFULLY! Set the number of Joules absorbed by the water (129.704 joules) equal to the Joules released by the burning marshmallow, and divide by the mass of marshmallow actually burned (0.8g). This will give the Joules per gram for marshmallow. Show all work. Your answer should have units of J/g.
Homework Answers
Add Answer to:
Initial
Final
Mass of Marshmallow (g)
7.1g
6.3g
Temperature (oC)
29.1 oC
32.2 oC
1. Calculate...
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To receive full credit, you must SHOW ALL OF YOUR WORK. Answers that do not have complete work shown will be marked as incorrect. Workstation : Part A: Specific Heat of an unknown Metal 1. Unknown number 1326 18.09 8.37 2. Mass of unknown metal 9 3. Mass of empty calorimeter 9 Trial 1 Trial 2 Mass of calorimeter + water 45.23 g g Mass water 36.86 g g Initial Temperature of metal 100...
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