domthebomb
Mar3-09, 10:14 PM
1. The problem statement, all variables and given/known data
In a calorimeter, a 1.0g sample of magnesium is burned to form MgO. In doing so, 25.5 kJ of energy is released. The molar enthalpy of combustion of magnesium is:
a) -0.0392 kJ/mol
b) -25.5 kL/mol
c) -306.2 kJ/mol
d) -620 kJ/mol
2. Relevant equations
Q= mc DELTA t
3. The attempt at a solution
2Mg + O2 --> 2MgO
.... don't know where to start
PLEASE! i need help fast
1. The problem statement, all variables and given/known data
2. Relevant equations
3. The attempt at a solution
1. The problem statement, all variables and given/known data
2. Relevant equations
3. The attempt at a solution
In a calorimeter, a 1.0g sample of magnesium is burned to form MgO. In doing so, 25.5 kJ of energy is released. The molar enthalpy of combustion of magnesium is:
a) -0.0392 kJ/mol
b) -25.5 kL/mol
c) -306.2 kJ/mol
d) -620 kJ/mol
2. Relevant equations
Q= mc DELTA t
3. The attempt at a solution
2Mg + O2 --> 2MgO
.... don't know where to start
PLEASE! i need help fast
1. The problem statement, all variables and given/known data
2. Relevant equations
3. The attempt at a solution
1. The problem statement, all variables and given/known data
2. Relevant equations
3. The attempt at a solution