What will the sign on ∆S be for the following reaction and why? 2 Mg(s) + O₂(g) → 2 MgO(s)

Entropy is the measure of ________ in a system.

Classify the phase changes by the signs of the system's ΔH° and ΔS°.

Which of the following has the largest standard molar entropy, S° (298.15 K)?

Without doing any calculations, determine the signs of ΔS_sys and ΔS surr for each chemical reaction. In addition, predict under what temperatures (all temperatures, low temperatures, or high temperatures), if any, the reaction is spontaneous. a. C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g) ΔH°_rxn = -2044 kJ

What is the change in entropy that occurs in the system when 45.0 g of acetone (C₃H₆O) freezes at its melting point (-94.8 °C)? Use Table 11.9 for the heats of fusion.