Chapter E Flashcards
What does reliability depend on?
the instrument used to make the measurement
The number of digits reported in a measurement depends on what?
the measuring device
two different kinds of certainty
accuracy and precision
What is accuracy?
how close the measured value is to the actual value
What is precision?
how close a series of measurements are to one another or how reproducible they are.
Exact numbers
have no uncertainty and thus do not limit the number of significant figures in any calculation.
density
ratio of mass to volume
intensive property
independent of the amount of the substance
extensive property
depends on the amount of the substance.
Systems with high potential energy
the tendency of systems with high potential energy to change in a way that lowers their potential energy
exothermic
the change in energy is negative
endothermic
the change in energy is positive.
