PASCO TD-8572 HEAT ENGINE_ GAS LAW APPARATUS - Manual (Page 7)

012-06014C Heat Engine/Gas Law Apparatus
3
®
HEAT ENGINE GAS LAW APPARATUS
Piston Dia.: 32.5mm±0.1
TD-8572
CAUTION: Max. Pres.: 345kPa. Use Gases Only DO NOT Immerse in any Liquid DO NOT Lubricate Piston or Cylinder
Pressure Port Mating Connector: PASCO Part No. 640-021
Piston&Platform
Mass: 35.0g±0.6
m
Experiment 1: Operation of a Heat Engine
➀ Using the one-holed stopper, connect the tubing
with the one-way valves to the air chamber and
to a connecting port on the base assembly.
➁
Close the shut-off valve on the tubing from the
unused port.
➂
Set a mass of 100 to 200 g on the mass platform.
➀
Move the air chamber from an ice water bath to a
hot water bath. You will note that the air in the
chamber quickly expands through the tubing and
moves the piston up. Note also that the one-way
check valve in the tubing connecting the base
apparatus and the air chamber permits air to enter
the cylinder, while the other one-way check valve
prevents air from leaving through the branched
tube.
Equipment Setup
➤ Note: Use a maximum mass of 200 grams in
the experiment. A larger mass will cause the
valve seals to leak.
Procedure
➤ Note: The greater the temperature differential between the hot and cold water baths, the
greater the lift achieved through each cycle through them.
Figure 1.1. Setup for the Heat Engine
Close the shut-off
valve on the
tubing from the
unused port.
direction of
air flow
one-way check
valves
➁ Move the air chamber back to the cold bath and note that external air is sucked into the air
chamber through the one-way valve located at the end of the branched tube. Note also that the
one-way valve in the connecting tube prevents the air from escaping from the piston, so the
height of the piston remains the same.
➂
Repeat steps 3 and 4 until the mass has been completely lifted.
Equipment Required:
• Heat Engine/Gas Law Apparatus
• 100 – 200 g mass
• container of hot water
• container of ice water