Energetics Test

Welcome to the OSC Chemistry blogs. My name is Dave and in the past I wrote the Chemistry blogs for TripleALearning. This first blog is an entertainnig story for yourself and has been directly sourced from another website (see below). It is also a test for me, to check all of the software is working!. Enjoy! Dr. Schambaugh, of the University of Oklahoma School of Chemical Engineering, Final Exam question for May of 1997. Dr. Schambaugh is known for asking questions such as, "why ...

Heat flow

Heat is a bit like time - it only flows in one direction. From heat's point of view it flows from hot to cold. Here is a dead simple experiment to show this - and it contains some good IB Chemistry as well. Get an ice cube. Soak a piece of string in water. Lay the end of the string on the ice cube and sprinkle some salt onto the string. The string will freeze onto the ice cube. But why? Well, ...

Exothermic and Endothermic Change

Students love new trends and we have one just starting in our school that has origionated from some lessons (not mine!) on endo and exothermic reactions. The trend is handwarmers ...... and it's not even that cold! There are two types of heat changes associated with chemical reactions. Exothermic reactions (ones that give off heat energy) and endothermic reactions (those that take in heat enery). An example of an exothermic reaction would the thermite reaction:   This reaction evolves (gives off) large amounts of heat ...

Is Hell Exo or Endothermic?

Dr. Schambaugh, of the University of Oklahoma School of Chemical Engineering, Final Exam question for May of 1997. Dr. Schambaugh is known for asking questions such as, "why do airplanes fly?" on his final exams. His one and only final exam question in May 1997 for his Momentum, Heat and Mass Transfer II class was: "Is hell exothermic or endothermic? Support your answer with proof." Most of the students wrote proofs of their beliefs using Boyle's Law or some variant. One ...