Zadania z chemii IB HL

Calculate the rise in temperature of 400.0 $\mathrm{cm^3}$ of water heated by the complete combustion of 2.00 g of butan-1-ol, assuming that all the energy released is transferred to the water. Use sections 2 and 14 of the data booklet.

Which equation represents both the standard enthalpy of formation, $\Delta H_\mathrm{f}^\ominus$, of a compound and the standard enthalpy of combustion, $\Delta H_\mathrm{c}^\ominus$, of an element? A. $\ce{C(s) + 1/2 O2(g) -> CO(g)}$ B.…

(i) Using section 12 of the data booklet, determine the standard enthalpy change of the reaction, in $\mathrm{kJ\,mol^{-1}}$. (ii) A value obtained from bond enthalpies is less accurate than one obtained from enthalpies of formation. State two reasons why.…

What is the enthalpy change, in $\mathrm{kJ\,mol^{-1}}$, for the formation of methanol from carbon monoxide and hydrogen? $\ce{CO(g) + 2H2(g) -> CH3OH(l)}$ Substance $\Delta H_\mathrm{c}^\ominus$ / $\mathrm{kJ\,mol^{-1}}$ $\ce{CO(g)}$ −283 $\ce{H2(g)}$ −286…