Is rusting of an iron exothermic or endothermic event if the nail is the system? exothermic or endothermic?

What effect might melting sea ice have for people who live in coastal areas?

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90