Pre-Laboratory Assignment 11 Discovering Instant Cold Packs I only need help with question 5 a, b and c thank you 1. Bas

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Pre-Laboratory Assignment 11
Discovering Instant Cold Packs
I only need help with question 5 a, b and c thank you
1. Based on Equation 4 in the Background section, identify the
information (data) needed to calculate the enthalpy change for a
reaction. How will these data be obtained in this experiment?
Equation 4 qp = m x s x /delta t
2. Identify all possible variables that will influence the
experimental data.
3. The independent variable in an experiment is the variable
that is manipulated by the experimenter, while the dependent
variable responds to (depends on) changes in the independent
variable. Choose the dependent and independent variable for your
guided-inquiry procedure to determine the heat of solution for a
cold pack.
4. What variables should be controlled (kept constant during the
procedure)?
5. a. Discuss the factors that will affect the precision of the
experimental results.
b. Discuss the equipment and glassware that should be used to
obtain precise measurements of the quantities that must be measured
in a calorimetry experiment.
c. How can the precision due to random experimental error be
improved?