00:01
Hello students welcome here in this question we have given 10 m l of water 10 ml of water is given at temperature 25 degrees celsius and it is added to iron iron fe which is mass is 1 .2 k g is given and it is when it is added to this one 10 m l of water at 25 degrees celsius is added to iron skillet which is a entire so total volume of water is evaporated at 100 degrees celsius so entire volume how much water is present there totally 10 amel of water is evaporated so here we had to calculate the temperature change for iron skillet okay now we will see the water volume we have given.
01:01
So number of this one is c iron.
01:04
So molar heat capacity for this one is given.
01:08
25 .19 joules per mole.
01:12
Molar heat capacity is given.
01:14
So that's why it is like this.
01:17
So here the molar heat capacity for water is 37 .6 joules per mole degree celsius and density is equal to 1.
01:29
That's why here the number of moles of water is can be calculated so moles of water is equal to 10 divided by 18 so this is 18 .01 that is equal to 0 .552 to 0 .552 moles is the water and what is the number of moles of this one is so number of moles of iron is equal to 120 kilograms means we will take this one in the k grams so that's why 1 ,200 grams divided by what is a molar mass? 55 .845 is a molar mass so here the number of moles is 21 .488 moles this one is okay so we know the number of moles and all the given data is enough to react to calculate.
02:34
So we know that the heat absorbed by water is equal to heat released by iron skillet.
02:41
So that's why here see number of moles of water, cw, delta t, w is equal to...