I need to find Q in joules (J) for both experiment #1 and #2 but I'm unsure of how to write the equation they gave me

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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I need to find Q in joules (J) for both experiment #1 and #2 but I'm unsure of how to write the equation they gave me

Experiment #1Experiment #2
Initial Temperature, To
Final Temperature, J
Temperature Change, AT 11.7
Mass of magnesium, mMg
20.5
20.5
32.2
42.3
21.8
0.138 g
0.241 g
Transcribed Image Text:Experiment #1Experiment #2 Initial Temperature, To Final Temperature, J Temperature Change, AT 11.7 Mass of magnesium, mMg 20.5 20.5 32.2 42.3 21.8 0.138 g 0.241 g
Calculation of Molar Heat of Reaction
The heat, Q, absorbed by the calorimeter and its contents during the course of the
reaction can be calculated from the change in temperature, AT, using equation 1.
Q = Ccal AT + m Csp AT
Eq. 1
Here Ccal is the heat capacity of the Styrofoam calorimeter, m is the mass of the
calorimeter contents, and Csp is the specific heat of those contents. You may take Ccal
to equal 20.0 J/°C. Since the contents are mostly water, which has a density of 1.0 g/mL,
the mass of the contents, m, can be approximated as 50.0 g. You may also take the
specific heat, Csp, of the solution to be that of pure water (4.184 J/g°C).
Transcribed Image Text:Calculation of Molar Heat of Reaction The heat, Q, absorbed by the calorimeter and its contents during the course of the reaction can be calculated from the change in temperature, AT, using equation 1. Q = Ccal AT + m Csp AT Eq. 1 Here Ccal is the heat capacity of the Styrofoam calorimeter, m is the mass of the calorimeter contents, and Csp is the specific heat of those contents. You may take Ccal to equal 20.0 J/°C. Since the contents are mostly water, which has a density of 1.0 g/mL, the mass of the contents, m, can be approximated as 50.0 g. You may also take the specific heat, Csp, of the solution to be that of pure water (4.184 J/g°C).
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