Question: Use the experimental values to calculate the enthalpy change in each system.

Observation
Quantity of reactant 1 5.61 g KOH(s)
Quantity of reactant 2 N/A
Initial Temperature (oC) 20.0
Final Temperature (oC) 24.1

ΔT = tf - ti
= 24.1 oC - 20.0 oC
= 4.1 oC

qt = 0

qt = qreaction+ qwater

qreaction= - qwater

qp= - mwaterCp(water) DT

qp = mc ΔT

= (5.61 g) (4.186 joule/gram °C) (4.1 oC)

=96.14 J

Where H is the Hfinal minus Hinitial and q is heat
ΔH = ( mcΔT)/n

n = (mass of compound)/(molar mass of compound)

= (5.61 g KOH(s))/(56.1 g/mol)

=
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