2. Determine whether the following errors will lead to a heat quantity (q) large

Question

2. Determine whether the following errors will lead to a heat quantity (q) larger in magnitude or a heat quantity (q) smaller in magnitude. Circle your answers. Higher q in magnitude Lower q in magnitude eter kept falling off a) The top of the calorimeter kept falling off b) You noticed some of the solid reactant wasHigher q in magnitude Lower q in magnitude than expected than expected than expected than expected than expected than expecte left on the weighing paper Higher q in magnitude Lower q in magnitude c) One cup was used in the experimental setup

Explanation / Answer

a) When the top of the calorimeter keeps falling off, then some heat energy might escape and
result in smaller T as final temperature comes down. Hence lower q in magnitude than expected
is the answer since q = mCpT , q is directly proportional to T.

b) If some of the solid reactant was left on the weighing paper then the mass of the solution
will be reduced hence q will be lower in magnitude than expected.

c) For good insulation 2 cups must be used, if one cup is used then the heat gets dissipated
to the surroundings which will result in the temperature drop hence q will be lower than expected.

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