Convert 19 kcal into joules
1 answer:
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Answer:
Heat required to melt 26.0 g of ice at its melting point is 8.66 kJ.
Explanation:
Number of moles of water in 26 g of water: 26× moles
=1.44 moles
The enthalpy change for melting ice is called the entlaphy of fusion. Its value is 6.02 kj/mol.
we have relation as:
q = n × ΔH
where:
q = heat
n = moles
Δ H = enthalpy
So calculating we get,
q= 1.44*6.02 kJ
q= 8.66 kJ
We require 8.66 kJ of energy to melt 26g of ice.
Answer:
The mass of in the container is 2.074 gram
Explanation:
Given:
Volume of
lit
Equilibrium constant
The reaction in which is produced
⇄
Here equal moles of and
is formed.
From the formula of equilibrium constant,
M
Above value shows,
So in 2 L no. moles of =
moles.
So mass of 0.122 mole of is =
g
Therefore, the mass of in the container is 2.074 gram