You take an ice cube (mass = 18g) from the freezer (T=-10°C) and place it on the table. Later that day, you notice a puddle of water on the table that has reached ambient room temperature (20°C). How much heat must have been absorbed to make this happen? A) 1867.0 J B) 2260.4 J C) 7897.0 J D) 42657.0 J
Answers
U = mCpΔT
where:
m = mass of material
Cp = specific heat capacity of material; in this case, Cpwater = 4.186 J/(g-°C)
ΔT = change in temperature of material
U = 18(4.186)(20-(-10)) = 2260.44 Joules or B.
A positive term means energy was absorbed.
the correct answer is 7897.0 Joules
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Several steps are involved in the industrial production of sulfuric acid. One step involves the oxidation of sulfur dioxide gas to form sulfur trioxide gas. A catalyst is used to increase the rate of production of sulfur trioxide gas. In a rigid cylinder with a movable piston, this reaction reaches equilibrium, as represented by the equation below.2SO2(g) + O2(g) <==> 2SO3(g) + 392 kJ Explain, in terms of collision theory, why increasing the pressure of the gases in the cylinder increases the rate of the forward reaction. Determine the amount of heat released by the production of 1.0 mole of SO3(g). State, in terms of the concentration of SO3(g) , what occurs when more O2(g) is added to the reaction at equilibrium.
a. I
b. F
c. Ir
d. Fe
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Answer:
A.
Explanation:
The amount of mass always stays the same, matter cannot be created nor destroyed, it can only change forms. Thus, the answer is A.
In a chemical reaction the total mass of all the substances taking part in the reaction remains the same. Also, the number of atoms in a reaction remains the same. Mass cannot be created or destroyed in a chemical reaction.
I hope this helps..
2Na + 2H2O 2NaOH + H2
Answers
Answer: YES
Explanation: The given chemical equation can be balanced by balancing the stiochiometric number of each and every element.
This rule is in accordance with the Law of Conservation of Masses which states that the masses of the elements in any chemical equation are constant at any instant of time.
Thus the given equation can be written as
equation balanced:
2 Na + 2 H₂O = 2 NaOH + H₂ ( single replacement )
hope this helps!
b. NaC₂H₃O₂(s)
c. C₆H₁₂O₆(aq)
d. CH₃OH(aq)
e. NaCl(s)
It would be great if you could add a few words of explanation
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Any type of metal may join with a non-metal, such as carbon, nitrogen, oxygen, sulfur, phosphorus, and selenium, to create ionic compounds.
What is an ionic compound ?
A chemical compound known as an ionic compound is one that contains ions bound together by the electrostatic forces known as ionic bonding. Despite having both positively and negatively charged ions, or cations and anions, the molecule is generally neutral.
In most cases, ionic compounds are created between metal and nonmetal components. For instance, the ionic compound calcium chloride is made up of the metal calcium (Ca) and the nonmetal chlorine (Cl) (CaCl2).
A nonmetal and a metal can create an ionic bond, which is the attraction between two ions with opposing charges.
Thus, metal are joined with a non-metal, such as carbon, nitrogen, oxygen, sulfur, phosphorus, and selenium, to create ionic compounds.
To learn more about ionic compound, follow the link;
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Answer/Explanation:
Aluminum and oxygen
Fluorine and oxygen
Ionic compounds are formed when any type of metal is combined with a non-metal such as carbon, nitrogen, oxygen, sulfur, phosphorus, and selenium.
(any)metal + nonmetal = ionic compound