My book introduces Thermochemistry with the concept of heat and how a calorimeter works. After that, it explains the story behind Hess Law and says that one of the reasons it was created is because a calorimeter can't calculate fast chemical reactions, but it doesn't really say the problem with...
I need quite urgent help. I have carried out experimentally two reactions as follows:
1. CaO + H2O -> Ca(OH)2
2. Ca(OH)2 + 2HNO3 -> Ca(NO3)2 + 2H2O
to prove Hess's Law for this reaction:
3. CaO + 2HNO3 -> Ca(NO3)2 + H2O
How do I do calculate the enthalpies? Is q=mcΔT enough...
ClO(g) + O3(g) ---> Cl(g) + 2 O2(g) delta H of rxn= -29.90kJ
2 O3(g) ----> 3 O2(g) delta H of rxn= 24.18kJ
Determine the value of heat of reaction for the following:
Cl(g) + O3(g) ----> ClO(g)+O2(g) Delta H = ?
Can somebody please explain how to do the following two questions, please?
1.For the reaction 4Fe(s) + 3O2(g) --> 2Fe2O3(s) how much heat would be liberated by the combustion of 5.00 g of iron metal in excess oxygen?
2. If 3.00 g iron metal are reacted in a calorimeter with a heat capacity of...
Fe2O3 + 6HCl → 2FeCl3 + 3H2O
How much heat is produced when 2.6 g of Fe2O3 react with 0.91g of HCl?
For some reason, my brain is broken and I cannot remember how to even start this problem. Chemistry evades me completely this afternoon. I just need the steps to complete.
I am given the enthalpies of combustion C=-393.5, H2=-285.8, C2H5OH=-1366.7
I need to find the standard enthalpy change (deltaH) of the reaction;
I keep getting 293.9, but i'm not sure if this is correct.
I can't find the answer , Can anybody help?
The answer is -150 kj but I need a step by step explanation....
I have never taken anything like this before and I am very confused on how to even begin. Using the loggerpro and the calorimeter I need to determine the heat of formation for Mg and MgSO4.
Here are the equations for Mg:
I know the mass of...
The original equation is:
My equations are:
1) Fe+3H2O-->fe(OH3)+3/2(H2) h=160.9KJ
2) H2+1/2(O2)-->H2O H=-285.8KJ
3) Fe(OH3)-->Fe2O3+3H2O H=288.6KJ
Using Hess's law how do I get this back to the original equation?