Answer:
605.4 J
Explanation:
When a certain substance absorbs a certain amount of energy, its temperature increases according to the equation:
where
Q is the heat absorbed
m is the mass of the substance
C is the specific heat capacity of the substance
is the change in temperature
In this problem, we have:
m = 15.5 g is the mass of the piece of aluminium
C = 0.902 J/g⁰C is the specific heat of the aluminium
is the change in temperature of the aluminium (in fact, at thermal equilibrium, the block of aluminium reaches the same final temperature as the coffee)
Therefore, the energy absorbed is
The statement <span>“the hydronium ion concentration of a solution
that has a pH of 4.12 is 7.59 * 10^-9M</span>” is FALSE because the correct answer would be <span>7.6 x 10^-5 M. </span>I
am hoping that this answer has satisfied your query and it will be able to help
you in your endeavor, and if you would like, feel free to ask another question.
Answer:
i just need points. But goodluck finding the answer tho. I believe in you:))
Explanation:
384.72 J is the heat of fusion of the substance.
<h3>What is the heat of fusion? </h3>
It is the change in the value of the enthalpy by providing energy i.e. heat, for a specific quantity of the substance.
Given data:
Heat of fusion =?
Mass of substance = 8.4 g
Unknown:
Amount of energy required to melt the given mass = 45.8 cal
Solution:
To solve this problem, the amount of energy required to melt the substance is given as;
H = m L
m is the mass
L is the heat of fusion
Insert the given parameters and solve;
H = 8.4 g x 45.8 cal = 384.72 J
Hence, 384.72 J is the heat of fusion of the substance.
Learn more about heat of fusion here:
brainly.com/question/19531870
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The two ways to make a saturated solution are 1 reducing the temperature of the solution and Adding more solute.<span> </span>