If a substance is heated or cooled, the
change in mass of that substance is
a) positive b) negative
c) zero
d) none of the above
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Answer:
c) Zero
Explanation:
Q=mCp(t2-t1)
Q-heat energy
m-mass of the substance
t2-t1 - change in temperature (since heating or cooling means temperature change)
Cp-heat constant
the above equation shows that the temperature change doesn't affect the mass.
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