When the acetone evaporates, what is the change in enthalpy
(AH) for this process?

a) negative (-)
b) positive (+)
c) zero (0)
d) unknown, it's temp dependent (?)​

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

The diagram shows the relationship between scientific disciplines. the names of some scientific disciplines have been removed from the boxes. which scientific discipline belongs in the blue box? a. physics b. biology c. chemistry d. metallurgy