How to Calculate the Heat Released in Magnesium Combustion Reactions?

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SUMMARY

The discussion focuses on calculating the heat released during the combustion of magnesium using the formula Q=McΔT. Two sets of data are provided: one for magnesium oxide (MgO) and another for magnesium (Mg) with their respective masses, volumes of hydrochloric acid (HCl), and temperature changes. The key takeaway is that one calorie of heat is required to change the temperature of one milliliter of solution by one degree Celsius, which is essential for applying the heat equation correctly.

PREREQUISITES
  • Understanding of calorimetry principles
  • Familiarity with the specific heat capacity concept
  • Knowledge of chemical reaction equations
  • Basic skills in algebra for manipulating equations
NEXT STEPS
  • Research the specific heat capacity of solutions
  • Learn how to perform calorimetry calculations
  • Study the enthalpy of combustion for magnesium
  • Explore the application of Q=McΔT in different chemical reactions
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Chemistry students, educators, and anyone involved in thermodynamics or calorimetry experiments will benefit from this discussion.

blackblanx
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Homework Statement



Heat of Reaction for the combustion of Magnesium

Data:

A. Mass MgO = 0.7975g Volume 1M HCl = 97.5 ml
Temp.intial = 24.2 C Temp.final = 29.3 C [tex]\Delta[/tex]T = 5.1 C

B. mass Mg 0.0896g Volume 1M HCl 89.5 ml
Temp. intial = 24.1 c Temp. final = 28.4 c [tex]\Delta[/tex]T = 4.3 C

With the following data above I need to calculate the heat realsed for each reaction

Homework Equations


Need to use Q=Mc [tex]\Delta[/tex]T also the question tells you to assume one cal of heat is required to change the temperature of one ml of solution one degree Celsius


The Attempt at a Solution


not sure were to begin
 
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You actually have all of the data you need...

Just turn the last sentence into something more mathematical.

"one calorie of heat is required to change the temperature per 1 degree C per mL of solution"

Is the same as

[tex]\frac{Q}{T \cross V}[/tex]

which describes a specific heat capacity, I believe.
 

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