How much heat (in kilojoules) is evolved or absorbed in the reaction of 1.90g of Na with H2O ?
1 answer:
The heat of the reaction is an extensive property: it is proportional to the quantity of the quantity that reacts.
The change in enthalpy is a measured of the heat evolved of absorbed.
When the heat is released, the change in enthalpy is negative.
The reaction of 2 moles of Na develops 368.4 kj of energy.
Calculate the number of moles of Na in 1.90 g to find the heat released when this quantity reacts.
Atomic mass of Na: 23 g/mol
#mol Na = 1.90 g / 23 g/mol = 0.0826 mol
Do the ratios: [368.4 kj/2mol ] * 0.0826 mol = 15.21 kj.
Then the answer is that 15.21 kj of heat is released (evolved)
You might be interested in
<span>An ionized atom has a number of protons that is unequal to the number of electrons. - I took the Penn exam, 100% sure!</span>
Answer:
= 100u. Hence 10 g = 0.1 mole. Hope it's helpful to u
Mass =?
moles of N2 = 4.25 x 103 mol
molar mass of N2 = (14)x2 = 28
Is there choices? Cuz if there is i Need them
A bronsted lowry base will react to accept protons
