The heat released when one mole of water is formed from the

The heat released when one mole of water is formed from the elements is 1,198 kJ. An experiment was conducted that permitted water to form in this manner, and the heat was contained in 2.0 liters of water. The water temperature before the reaction was 34.5

Solution

let x moles of water be formed

so heat released = x*1198KJ

mass of water formd = x*18 gm

amount of water already present = 2L

density of water = 1000g/L

mass = 1000*2 = 2000g

total mass = 2000+18*x

now heat q = mCdT

dT = 52-34.5 = 17.5C

C = 0.0041KJ/gC

x*1198 = (2000 + 18*x) * 17.5 * 0.0041

1198X = 143.5 + 1.2915X

X = 0.1199 moles