0000000000377169
AUTHOR
Bjørn Hafskjold
Development of a Chemistry Concept Inventory for General Chemistry Students at Norwegian and Finnish Universities
A Chemistry concept inventory has been developed for assessing students’ learning and identifying alternative conceptions that students may have in general chemistry. The inventory aims at functioning as a tool for adjusting teaching practices in chemistry and is mainly aimed at assessing students’ learning during general chemistry courses. The inventory was administered as a post-test in a general chemistry course at the Norwegian University of Science and Technology (NTNU) in spring 2015, and evaluated using different statistical tests, focusing both on item analysis and the test as a whole. The results from this analysis indicated that the concept inventory is a reliable and discriminati…
Thermal Flux through a Surface of n-Octane. A Non-equilibrium Molecular Dynamics Study
We show using non-equilibrium molecular dynamics that there is local equilibrium in the surface when a two-phase fluid of n-octane is exposed to a large temperature gradient (10 8 K/m). The surface is defined according to Gibbs, and the transport across the surface is described with non-equilibrium thermodynamics. The structure of the surface in the presence of the gradient is the same as if the interface was in equilibrium, as measured by the variation across the surface of the pressure component that is parallel to the surface. The surface is in local equilibrium by this criterion and because the equation of state for the surface was unaltered by a large heat flux. The surface has a small…