# Gen. Chem. 2 Lab assignment help

1. Apr 7, 2010

### blackblanx

1. The problem statement, all variables and given/known data

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 $$\Delta$$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 $$\Delta$$T = 4.3 C

With the following data above I need to calculate the heat realsed for each reaction
2. Relevant equations
Need to use Q=Mc $$\Delta$$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

3. The attempt at a solution
not sure were to begin

2. Apr 8, 2010

### Char. Limit

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

$$\frac{Q}{T \cross V}$$

which describes a specific heat capacity, I believe.