Electrical energy is transformed into many energy forms and is used to power most of the household appliances we used every day.
1 answer:
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Answer:
The correct answer is "5217 Cal".
Explanation:
The given values are:
Specific heat,
c = 3.76 cal/g°C
Mass,
m = 25.0 g
Initial temperature,
T₁ = 21.5°C
Final temperature,
T₂ = 77.0°C
Now,
The heat energy will be:
⇒
On substituting the given values, we get
⇒
⇒
⇒
H₂S
<h3>Further explanation</h3>Given
ΔH fusion and ΔH vaporization of different substances
Required
The substance absorbs 58.16 kJ of energy when 3.11 mol vaporizes
Solution
We can use the formula :
Q=heat/energy absorbed
n = moles
The heat absorbed : 58.16 kJ
moles = 3.11
so ΔH vaporization :
The correct substance which has ΔH vaporization = 18.7 kj / mol is H₂S
(H₂S from the data above has ΔH fusion = 2.37 kj / mol and ΔH vaporization = 18.7 kj / mol)