Given the following reactions, estimate the overall enthalpy…
Given the following reactions, estimate the overall enthalpy change for the dissolution of solid sodium hydroxide in water: NaOH(s) → Na+(aq) + OH-(aq). Na(s) + ½H2(g) + ½O2(g) → NaOH(s) ∆H° = −427 kJ/mol Na(s) + H2O(l) → Na+(aq) + OH-(aq) + ½H2(g) ∆H° = −184 kJ/mol 2 H2(g) + O2(g) → 2 H2O(l) ∆H° = −572 kJ/mol
Read DetailsAn automobile air conditioner uses liquid R-134a (normal boi…
An automobile air conditioner uses liquid R-134a (normal boiling point −26 °C). Inside the cabin, the pressurized liquid is allowed to expand and evaporate into a gas. At the molecular level, why does this evaporation cool the cabin air?
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