1. Discuss briefly system and surrounding using suitable examples, highlighting heat transfers. 14 marks
1 answer:
A system is a part of the <em>physical</em> universe defined <em>arbitrarily</em> for observation purposes.
Boundaries are a part of the <em>physical</em> universe that are around the system.
In a scientific sense, a system is a part of the <em>physical</em> universe whose boundaries, that is, the limit between the system and its surroundings, are defined <em>arbitrarily</em> for observation purposes.
A system contains at least a model, represented in a phenomenological way, and it can be isolated (no mass nor energy interactions), closed (no mass interactions) or open.
The surroundings are a part of the <em>physical</em> universe that are around the system.
An example is a coffee-maker, where coffee-maker the system and air represents the surroundings, the coffee-maker receives energy from a heat source to warm up itself and releases part of such energy to the air.
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Answer:
The answer to your question is: P2 = 772.35 torr.
Explanation:
Data
P1 = 3990 torr.
V1 = 3.41 L
T1 = -91.5°C = 181.5°K
P2 = ?
V2 = 3.3 L
T2 = -239°C = 34°K
Formula
P2 = \frac{(3990)(3.41)(34)}{(181.5)(3.3)}[/tex]
P2 = 462600.6 / 598.95
P2 = 772.35 torr.