What do (a) homogeneous reactions and (b) heterogeneous reactions represent in mass transfer? To what do they correspond in heat transfer?
What will be an ideal response?
Bulk fluid flow refers to the transportation of a fluid on a macroscopic level from one location to another in a flow section by a mover such as a fan or a pump. Mass flow requires the presence of two regions at different chemical compositions, and it refers to the movement of a chemical species from a high concentration region towards a lower concentration one relative to the other chemical species present in the medium. Mass transfer cannot occur in a homogeneous medium.
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_____ is a term for the current of air created by the variation in pressure resulting from differences in weight between the hot gases in the flue and the cooler air outside the chimney.
A. Rumford B. Heat source C. Motion D. Draft
The leading fiber crop in the world is:
a. flax c. hemp b. cotton d. sisal
Drafting revisions are completed in:
A. alphabetical order B. order of importance C. groups that are similar D. chronological order E. none of the above
When heat is applied or when a catalyst is added to _________________________ plastics undergo an irreversible chemical change.
Fill in the blank(s) with the appropriate word(s).