Thermochemistry

Name: Callie Archibald
Partner: Coral Hutchinson
Formal Laboratory Report
C125 observational Chemistry I
Section 8000
IUPUI
October 21, 2012

Thermochemistry
INTRODUCTION
In chemistry it is often prerequisite to determine how readiness moves. Each substance
has a kindle capacity. When substances reply energy is either absorbed or released in the
cause of heat. If the energy is absorbed we say that the reaction is endothermic and if
energy is released the reaction is exothermic.
In thermodynamics energy and its changing forms 1 be studied. To find the heat
of a reaction, a simple device called a calorimeter is used. By using this device and taking
measurements of aggregate temperature the heat of a reaction gutter be determined.
?H rxn = -(C calorimeter +C circumscribe ) ?T

(1)

Eq. 1 shows that when the specific heat of a calorimeter is added to the specific heat of
the contents of the calorimeter, then multiplied by the change in temperature, the heat of
the reaction can be determined.
In localize to find the heat of the reaction, first C (heat capacity) has to be found.
The C versatile is the heat capacity for each substance. C essential be calculated for both the
calorimeter and its contents.
C = (C SH ) x (mass of the substance)

(2)

Eq.



2 shows that when the C SH (specific heat) of a substance is multiplied by the mass of
the substance, then C (heat capacity) can be found.
The second variable we need to find it the change in temperature (?T).
?T = T f - T i

(3)

Eq. 3 shows that when the ?T (change in termperature) can be found by subtracting the
initial temperature (T i ) from the last(a) temperature (T f ).

EXPERIMENTAL
For part I, a calorimeter was constructed using a beaker, dickens Styrofoam cups,
cardboard, a rubber stopper, and a thermometer. 50.0 mL of water from the carboy was
situated in the calorimeter, and then allowed to reach temperature equilibrium. 50.0 mL of
water from the carboy was modify until 40C° warmer than room...If you want to get a full essay, browse it on our website: Orderessay



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