[staga]

Hello everyone,

I was wondering if anyone could help me with this question...

sodium bicorbonate is heated and decomposes into sodium carbonate, water vapour and CO2. The deltaH for this reaction is +64.6 kJ/mol.

Using enthalpys of formation, calculate the enthalpy of formation of sodium bicarbonate.

So far ive only come uo with a balanced equation..

NaHCO3+ heat→ 1⁄2 Na2CO3+ 1⁄2 H2O + 1⁄2 CO2    ∆H=+ 64.6 kJ/mol

Thanks,
-Dan

[ContinuousProcess]

Using enthalpys of formation,

Use the enthalpies of formation. (For the other species involved.)

After it's a simple game of addition.

[opti384]

The overall enthalpy of the reaction will be [those of the products] - [those of the reactants].