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drek231 [11]
3 years ago
7

Suppose you needed to cool off 19.8 grams of water at 33.3 °C to 28 °C. Calculate the energy released in this process.

Chemistry
1 answer:
crimeas [40]3 years ago
4 0
<h2>Answer:  439.07 J</h2>

Explanation:

The energy released can be calculated using the formula Q = mcΔT; here Q is the heat energy transferred (in joules), m is the mass of the liquid being cooled (in grams), c is the specific heat capacity of the liquid (joule per gram degrees Celsius), and ΔT is the change in temperature.

since m = 19.8 g

         c  = 4.184 J/g ·°C

       ΔT = 33.3 °C - 28 °C =  5.3 °C

⇒ Q = (19.8 g) (4.184  J/g ·°C)(5.3 °C)

    Q =  439.07 J

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Consider the two gaseous equilibria: The values of the equilibrium constants K 1 and K 2 are related by
Sauron [17]

The question is missing parts. The complete question is as follows.

Consider the two gaseous equilibria involving SO2 and the corresponding equilibrium constants at 298K:

SO_{2}_{(g)} + \frac{1}{2}O_{2} ⇔ SO_{3}_{(g)}; K_{1}

2SO_{3}_{(g)} ⇔ 2SO_{2}_{(g)}+O_{2}_{(g)}; K_{2}

The values of the equilibrium constants are related by:

a) K_{1} = K_{2}

b) K_{2} = K_{1}^{2}

c) K_{2} = \frac{1}{K_{1}^{2}}

d) K_{2}=\frac{1}{K_{1}}

Answer: c) K_{2} = \frac{1}{K_{1}^{2}}

Explanation: <u>Equilibrium</u> <u>constant</u> is a value in which the rate of the reaction going towards the right is the same rate as the reaction going towards the left. It is represented by letter K and is calculated as:

K=\frac{[products]^{n}}{[reagents]^{m}}

The concentration of each product divided by the concentration of each reagent. The indices, m and n, represent the coefficient of each product and each reagent.

The equilibrium constants of each reaction are:

SO_{2}_{(g)} + \frac{1}{2}O_{2} ⇔ SO_{3}_{(g)}

K_{1}=\frac{[SO_{3}]}{[SO_{2}][O_{2}]^{1/2}}

2SO_{3}_{(g)} ⇔ 2SO_{2}_{(g)}+O_{2}_{(g)}

K_{2}=\frac{[SO_{2}]^{2}[O_{2}]}{[SO_{3}]^{2}}

Now, analysing each constant, it is easy to see that K_{1} is the inverse of K_{2}.

If you doubled the first reaction, it will have the same coefficients of the second reaction. Since coefficients are "transformed" in power for the constant, the relationship is:

K_{2}=\frac{1}{K_{1}^{2}}

8 0
3 years ago
Dominique goes to the doctor for bone aches. The doctor tells him
olga2289 [7]

Answer:

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Explanation:

Our body creates vitamin D from direct sunlight on our skin when we're outdoors.

8 0
3 years ago
Determine whether each of the following statements about the thermodynamic functions are True or False as they apply to chemical
ANEK [815]

Answer:

t, t, f, t, f, f

Explanation:

t- true

f- false

4 0
3 years ago
Can anyone tell me 5 reactions of metals with nonmetals?​
jeyben [28]

non-Metals:

Nitrogen.

Oxygen.

Helium.

Sulfur.

Chlorine.

Explanation/Answer:

Metal atoms have only a few electrons in their outer shell whereas non-metal atoms have lots of electrons in their outer shell. This means that metals tend to react with non-metals. When a metal reacts with a non-metal, electrons transfer from the metal to the non-metal.

HOPE I HELPED!!

7 0
3 years ago
Which compound has both ionic and covalent bonding?.
Nikitich [7]

Answer: Calcium carbonate is another example of a compound with both ionic and covalent bonds. Here calcium acts as the cation, with the carbonate species as the anion. These species share an ionic bond, while the carbon and oxygen atoms in carbonate are covalently bonded

Explanation:

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