Part B
Criteria are the goals that the design must achieve. They're
determined by what you want your tool or device to do. List at
least two criteria for your tool or device based on the question,
What do you want it to do?

is this for the e2020 class

easy

explanation:

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.