The amount of heat required to convert H₂O to steam is : 382.62 kJ
<u>Given data :</u>
Mass of liquid water ( m ) = 150 g
Temperature of liquid water = 43.5°C
Temperature of steam = 130°C
<h3 /><h3>Determine the amount of heat required </h3>
The amount of heat required = ∑ q1 + q2 + q3 ----- ( 1 )
where ;
q1 = heat required to change Temperature of water from 43.5°C to 100°C . q2 = heat required to change liquid water at 100°C to steam at 100°C
q3 = heat required to change temperature of steam at 100°C to 130°C
M* S
*ΔT
= 150 * 4.18 * ( 100 - 43.5 )
= 35425.5 J
moles * ΔHvap
= (150 / 18 )* 40.67 * 1000
= 338916.67 J
M * S
* ΔT
= 150 * 1.84 * ( 130 -100 )
= 8280 J
Back to equation ( 1 )
Amount of heat required = 35425.5 + 338916.67 + 8280 = 382622.17 J
≈ 382.62 kJ
Hence we can conclude that The amount of heat required to convert H₂O to steam is : 382.62 kJ.
Learn more about Specific heat of water : brainly.com/question/16559442
The most abundant element in the Sun and in the stars are hydrogen and helium. Like most of the stars, there is a spontaneous radioactive reaction happening in the Sun. Hydrogen is transformed into Helium. As long as the stars are young, the most abundant element is hydrogen.
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I had this same question a while back, so I may not be right, but I'm pretty sure it's D. None of the above.
<h3>
Answer:</h3>
4.52 × 10^23 atoms
<h3>
Explanation:</h3>
Concept being tested: Moles and Avogadro's number
From the question we are given;
- Number of moles of Zinc = 0.750 moles
We are required to calculate the number of atoms of Zinc
- In order to answer the question, we need to know that a mole of an element contains atoms equivalent to the Avogadro's number.
- The Avogadro's number is 6.022 × 10^23.
Therefore;
1 mole of Zinc = 6.022 × 10^23 atoms
To calculate the number of atoms we need to multiply the number of moles with the Avogadro's constant.
= 0.750 moles × 6.022 × 10^23 atoms
= 4.52 × 10^23 atoms
Therefore; 0.750 moles of Zinc contains 4.52 × 10^23 atoms
