00:01
Hello and welcome to digital tea with mr.
00:03
E, where we will explore what is brewing in the world of physics solutions.
00:08
So in this problem, we have a red balloon with a yellow string, and i have a bunch of things drawn on the diagram to get us started with the givens.
00:17
We know that the balloon is going to stay at the same temperature throughout this process.
00:24
It also states that the balloon's going to absorb 75 joules of heat, which is why i have to have a lot of heat.
00:30
Have an arrow for the heat flowing into the balloon.
00:35
And at the same time, the balloon is going to expand.
00:40
And notice what i put for the expansion.
00:42
I put the arrow for work exiting the balloon, because the balloon has to do work on our environment in order to expand.
00:51
So the question asks us by how much work is actually done in this process.
00:58
So let's find the value w.
01:01
To do this, we're going to take a look at the first law of thermodynamics, which tells us that the change of internal energy of a system is equal to the amount of heat added to it plus the amount of work done on it...