SKU: AC-003

Joule's Heat - Emitting Heat Reaction(A)

Exothermic Reaction Apparatus to demonstrate Joule's heat

 Special Features.  - This is a tool that delivers a certain amount of heat by changing dynamic energy transformation to heat energy, and it rotates the motor.
 - It maximizes teaching and learning effect by producing a tool that measures a certain amount of heat quantitatively, and visualize measurement value in a given study period.
 - It maximizes teaching and learning effect by producing a tool that measures a certain amount of heat quantitatively, and visualize measurement value in a given study period.
 - By using cartridge heater, resistance doesn’t change by water. 
 - Due to the floating switch, the power is on when the water level is over the sensor.
 - Students can look inside the equipment (made from transparent plastic).
 - It has double partition in order to reduce the influence by outside condition.

Theory:
Joule's laws are a pair of laws concerning the heat produced by a current and the energy dependence of an ideal gas to that of pressure, volume, and temperature, respectively.Joule's first law, also known as the Joule effect, is a physical law expressing the relationship between the heat generated by the current flowing through a conductor. It is named for James Prescott Joule who studied the phenomenon in 1840s. It expressed as:

Where Q(J) is the heat generated by a constant current I flowing through a conductor of electrical resistance R, for a time t. When current, resistance and time are expressed in amperes, ohms, and seconds respectively, the unit of Q is the joule. Joule's first law is sometimes called the Joule-Lenz law since it was later independently discovered by Heinrich Lenz. The heating effect of conductors carrying currents is known as Joule heating.
                  Q(cal) = c x ΔT x m
                  1cal - 4 184 J (Mechanical equivalent of heat)

 How to use:
1. An experiment or measurement is not performed when there is no water for safety.
2. Pour water up to scale (more than 250cc for emerging cartridge).
3. Measure current temperature.
4. Connect power.
5. After given time, stir the agitator and check the temperature change.
6. Examine the relation between Joule's heat and mechanical equivalent of heat.

Specification:
 - Size : 5 Ohms , 10 Ohms (Voltage 6V).


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