For a particular reaction, Δ H ∘ = − 28.4 kJ/mol ΔH∘=−28.4 kJ/mol and Δ S ∘ = − 87.9 J / (mol ⋅ K). ΔS∘=−87.9 J/(mol⋅K). Assuming these values change very little with temperature, at what temperature does the reaction change from nonspontaneous to spontaneous in the forward direction?

Which type of stress results when two plates push against one another? a. compression b. tension c. force d. shear

How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)