Energy Comparison of Fuels Exercise 1: Energy Content of Fuels Data Table 1. Mas
ID: 880447 • Letter: E
Question
Energy Comparison of Fuels
Exercise 1: Energy Content of Fuels
Data Table 1. Mass and Density of Distilled Water.
Mass of 10.0 mL of distilled water
(g)
Density of water
(g/mL)
10
1.0
Take a picture of your candle set up, lit. Insert it here.
Data Table 2. Calorimetric Data.
Fuel Source:
Initial mass of fuel
(g)
Final mass of fuel
(g)
Initial
temperature
(°C)
Final temperature
(°C)
Fuel canister: (diethylene glycol)
110.4
99.1
22
97
Tea candle: (paraffin)
11.7
11.3
22.5
36
Data Table 3. Calories Released per Gram of Fuel.
Fuel Type
T (°C)
Calories absorbed by water (cal)
Grams of fuel consumed (g)
Calories/gram
Fuel canister: (diethylene glycol)
71
14200
11.3
1257
Tea candle: (paraffin)
11
2200
0.4
5500
Data Table 4.Calculated Thermodynamic Values
**This is not part of the procedure but it is required
Fuel Type
Q water
H
S
G
Fuel canister: (diethylene glycol)
????
??????????
???????
??????
Tea candle: (paraffin)
????
????????
???????
???????
Q water = - HsystemSsystem = - Hsystem/TG= H- T S
Please help me out to fill Data Table 4 ? Please mention the formulas as well.
Thank you so much
Mass of 10.0 mL of distilled water
(g)
Density of water
(g/mL)
10
1.0
Explanation / Answer
So for the Qwater you have to place the ¨Calories absorbed by water¨ from previous table . Then the DeltaH of the system is the - Qwater
S = H/T =- ( -14200)/(273.15+22) = +48.11
G= H- T S
G = -14200- (295.15)* 48.11
G = 0
Seems to be an adiabatic process.
Fuel Type
Q water
H
S
G
Fuel canister: (diethylene glycol)
14200
-14200
+48.1
0
Tea candle: (paraffin)
2200
-2200
+7.4
0
Fuel Type
Q water
H
S
G
Fuel canister: (diethylene glycol)
14200
-14200
+48.1
0
Tea candle: (paraffin)
2200
-2200
+7.4
0
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