00:01
Hi there, so for this problem we start with problem 1 that states that we have 10 mol of a monatomic gas, this at a temperature, the temperature is 100 celsius degrees.
00:15
So to have this in kelvin we need to add to this 273 .15 kelvin, so that will give us 373 .15 kelvin, okay? okay, so the kinetic energy is defined as 3 divided by 2 times boltzmann constant times the temperature.
00:37
So now we substitute the values 3 divided by 2 boltzmann constant that takes a value of 1 .38 times 10 to the minus 23 times the temperature.
00:51
And the temperature is 373 .15.
00:57
So now let's use our calculator for this.
01:08
The value that we obtain in here is 7 .72 times 10 to the minus 21 in units of joules.
01:29
Okay.
01:30
For the next question in here, we are asked about for problem two, is that at 300 grams mass of water is heated from 20 celsius degrees to 100 celsius degrees, how much heat energy is needed to change the temperature of the water? so for this problem, we just set the following equation.
01:56
The heat is the mass of the water, c, which is the specific heat capacity for water, and the change in temperature.
02:05
So the final temperature for this it is 100 and the initial temperature is 200 so the change in temperature is the difference between 120 so that will give us 80 celsius degrees um now we just calculate q so that will be the mass we are given for this that in grams is 300 grams that in kilograms is 0 .3 the specific heat of of water that is 4 .18 in units of joules.
02:37
Oh, sorry, this is going to be in grams, so we can already put this in grams.
02:44
So that will be 300 times 4 .18, and this times the change in temperature, that is 80.
02:51
So doing this product in here, we obtain a value of 100 ,320 joules.
03:06
Now for part 3, we are told that a constant pressure process is represented on a pressure volume graph.
03:20
Then for this, the correct answer when we have a pressure volume graph is that it is represented with option c, an horizontal line.
03:42
This because an isobaric process just like this which occurs under constant pressure is represented by an horizontal line on a pp or pressure -volume diagram okay so then that will be the answer for part three of this problem now for part four we are asked about which of the following materials conduct heat the most? the answer for this will be option c, that is metals.
04:22
This is because metals are known for their high thermal conductivity, allowing them to efficiently transfer heat.
04:30
This is due to free movement of electrons within the metal's structure, which which facilitates the transfer of thermal energy.
04:40
So that will be the answer for part four of this problem...