HOW DO YOU WRITE A BALANCED CHEMICAL REACTION COMPLETE W STATE SYMBOLS THAT CORRESPOND TO THE ENTHALPY?
To write the balanced chemical reaction to find the enthalpy of any compound, first find out all the elements it is composed of. Then, write a balanced chemical reaction for the compound using the formulas for the natural states (that is, the state of the element in which ΔH = 0). For example, lets take ammonium carbonate, (NH4)2CO3. It is comprised of N, H, C and O. So, the skeleton equation will be: N2 + H2 + C + O2 —> (NH4)2CO3 Balancing, we get: 2N2 + 8H2 + 2C + 3O2 —-> 2(NH4)2CO3 Incorporating the states, we get: 2N2(g) + 8H2(g) + 2C(s) + 3O2(g) —-> 2(NH4)2CO3(s) Using this reaction, we can find the enthalpy of formation for (NH4)2CO3. Follow a similar procedure for Hg3PO3. If you do that, you will get: P4(s) + 12Hg(l) + 6O2(g) —-> 4Hg3PO3(s) Hope this helps.
