Expansion Processes of a Perfect Gas. Expansion Processes of a Perfect Gas
The device follows the properties of a Perfect Gas using air to determine the basic thermodynamic processes.
This instrument also consists of two
floor-standing interconnected rigid vessels, one equipped for operation
under pressure and the second under vacuum.
Appropriate valves and tappings are
fitted to allow different thermodynamic processes to be evaluated. An
electric air pump is supplied to allow pressurisation or evacuation of
the vessels as required for the different exercises. Each vessel
incorporates a fast response thermistor sensor to monitor the
temperature of the air and connection to a piezo electric pressure
All power supplies, signal conditioning
circuitry etc are contained in a simple electrical console with
appropriate current protection devices and an RCD for operator
protection. Readings from the pressure sensors and thermistors are
displayed on a common digital meter with selector switch and
corresponding signals are routed to an I/O port for connection to a PC
using an optional interface device/educational software package or a
user supplied chart recorder as required.
A comprehensive instruction booklet describing how to carry out the laboratory teaching exercises is included.
Interconnected vessels operating under
pressure and under vacuum are supplied complete with electric air pump
and appropriate instrumentation ready for use.
This modern version of a classic
experiment (attributed to Clément and Désormes)allows pressure and
temperature changes to be monitored continuously using a PC. (optional
teaching software available)
The vessels can be operated singly or
in combination allowing processes whereby air flows from a pressurised
vessel to atmosphere, from atmosphere to an evacuated vessel or from a
pressurised vessel to an evacuated vessel.