Question

A gas in closed container is heated with 10 j of of energy causing the lead of the container to rise 3 m and with for N of the force what is the total change in the energy of system

Answer 1

Answer:

For this problem, use the first law of thermodynamics. The change in energy equals the increase in heat energy minus the work done.

$\large\rm { ∆U = Q - U}$

We are not given a value for work, but we can solve for it using the force and distance. Work is the product of force and displacement.

$\large\rm { W = F∆x }$

$\large\rm { W = 1N × 3m}$

$\large\rm { W = 3J}$

Now that we have the value of work done and the value for heat added, we can solve for the total change in energy

$\large\rm { ∆U = Q - U}$

$\large\rm { ∆U = 10-3}$

$\large\rm { ∆U = 7J}$