Butane, , is combusted in air according to the unbalanced…

CHEMISTRY · Multi-part · A Level · Chemistry · Thermodynamics · Thermodynamics

Problem

Butane,

C_4H_{10}(g)

, is combusted in air according to the unbalanced equation

C_4H_{10}(g) + O_2(g) \rightarrow CO_2(g) + H_2O(l)

(1) Part 1: (a) Balanced equation for complete combustion producing liquid water (2) Part 2: (b) Calculation of

\Delta n_{\text{gas}}

(3) Part 3: (c) Prediction and justification of the sign of

\Delta S^\circ

(4) Part 4: (d) Evaluation of

\Delta S^\circ

sign when water forms as vapor