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Miguel Paulo D. Valdez
BS Chem-3

EXPERIMENT 14- Heat Effects and Calorimetry
Objective/ Introduction:

Heat is a form of energy, sometimes called thermal energy, which can pass spontaneously from an object at a high temperature to an object at a lower temperature. If the two objects are in contact, they will, given sufficient time, both reach the same temperature. Heat always travels from hot to cold objects and two objects will reach an equilibrium temperature. Heat flow is commonly measured in a device called a calorimeter, an insulating container that minimizes heat exchange between its contents and the surrounding. Heat flow in a device called a calorimeter. In this experiment, we should find the heat capacity of the calorimeter, the heat of neutralization and the specific heat of a metal.

Data:

A. Specific HeatTrial 1Trial 2Trial 3

Mass of stoppered test tube5.2g5.2g5.2g

Mass of stoppered test tube and metal8.7g8.7g8.7g

Mass of calorimeter4.9g4.9g4.9g

Mass of calorimeter and water44g44g44g

Mass of water40g40g40g

Mass of metal2.5g2.5g2.5g

Initial temperature of water25 ˚C25 ˚C25 ˚C

Final temperature of water in calorimeter26˚C26 ˚C27 ˚C

∆Twater

∆Tmetal

q water

Specific Heat of metal

Approximate molar mass of metal
B. Heat of SolutionTrial 1Trial 2Trial 3

Mass of calorimeter plus water82.1g82.1g82.1g

Mass of beaker108.5g108.5g108.5g

Mass of beaker plus solid111g111g111g

Mass of water28.5g28.5g28.5g

Mass of solid2.5g2.5g2.5g

Initial temperature24˚C25˚C25˚C

Final temperature32˚C30˚C31˚C

Qwater:

∆Hrxn:

∆Hsolution per gram (J/g):

Molar ∆Hsolution (kJ/mol):

Is the solution reaction endothermic or exothermic? Explain your reasoning.:

C. Heat of Neutralization Trial 1Trial 2Trial 3

Original temperature of HCL sol’n28˚C27˚C...
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