A gas in a closed container is heated with 12J of energy, causing the lid of the container to rise 3m
with 5N of force. What is the total change in energy?
Answers
Given:
The gas inside the closed container is heated with an energy of 12 J
The lid of container rises to 3 m with a force of 5 N
To find:
The total change in energy
Solution:
The first law of thermodynamics is given by,
ΔU = Q - W
where
ΔU = Change in internal energy
Q = Heat supplied
W = Work done = Force × Displacement
So, we can rewrite the law as,
ΔU = Q - [Force × Displacement]
we will substitute the given values as Q = 12 J, F = 5 N and displacement = 3 m
⇒ ΔU = Q - [Force × Displacement}]
⇒ ΔU = 12 - [5 × 3]
⇒ ΔU = 12 - 15
⇒ ΔU = - 3 J ← the internal energy of the system decreases
Thus, the total change in energy is - 3 J.
-------------------------------------------------------------------------------------
Also View:
A gas is enclosed in a container fitted with a piston of cross-sectional area 0.10m2. The pressure of gas is maintained at 8000N/m2. When heat is slowly transferred the piston is pushed up through a distance of 4.0cm.If 42J heat is transferred to the system during the expansion what is the change in internal energy?
https://brainly.in/question/12240599
State and explain the first law of thermodynamics .
https://brainly.in/question/6861511