when a 25.7-g sample of NaI dissolves in 80.0 g of water in a calorimeter, the temperature rises drom 20.5 degrees celcius to 24.4 degrees celcius. calculate Delta heat for the process.
NaI(s)( arrow to the right) (aq)+ I ^-(aq) delta heat?
2007-10-16 11:04:11 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
It is not possible to answer this question as you also need the volume of water and the heat capacity of the calorimeter.
2007-10-16 11:10:00 · answer #1 · answered by Manuelon 4 · 0⤊ 0⤋
you are heating 80 g of water from 20.5 to 24.4 degrees C. So how much energy (heat) does it require to raise 80 g of water 3.9 degrees C? That is what this question is asking in a simpler term..
In order to raise 80g of water 3.9 degrees C you need to know the heat capacity for water. and then you simply used the equation
delta heat = (heat capacity of water)(mass of water)(Temperature change).
Just make sure all your units work out
2007-10-16 18:14:03 · answer #2 · answered by UA_Engineer_UAB_Med_Student 2 · 0⤊ 0⤋