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Nataliya [291]
4 years ago
14

1. You watch water falling from the top of a waterfall to the bottom. How would you characterize this physical phenomenon in ter

ms of spontaneity? What if you wanted to move the water from the bottom of the falls to the top—how would you characterize that reaction?
Chemistry
2 answers:
alexandr1967 [171]4 years ago
6 0
Well the reason why the water valve was because of the force of gravity. Without the force of gravity the water would have flown so if you had to try to move the water up the waterfall you would have to fight the force of gravity
aliya0001 [1]4 years ago
6 0

Answer:

Water falling from the top of the fall to the bottom is a spontaneous process. Raising water from the bottom to the top of the waterfall is a non-spontaneous process.

Explanation:

Water falling from the top of the fall to the bottom is a spontaneous process. The Earth’s gravity is pulling every object to the centre of the Earth. So it is difficult to overcome Earth’s centre of gravity and raise the water from the bottom to the top of the fall. Raising water from the bottom to the top of the waterfall is a non-spontaneous process.

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Which of the following compounds are ionic?
julsineya [31]

Answer:

a. KCl, c. BaCl2 and e. LiF.

Explanation:

Hello,

In this case, we can identify the ionic compounds by verifying the difference in the electronegativity between the bonding compounds when it is 1.7 or more (otherwise it is covalent) as shown below:

a. KCl: 3.0-0.9=2.1 -> Ionic.

b. C2H4: 2.5-2.1=0.4 -> Covalent.

c. BaCl2: 3.0-0.8=2.2 -> Ionic.

d. SiCl4: 3.0-1.8=1.2 -> Covalent.

e. LiF: 4.0-1.0=3.0 -> Ionic.

Therefore, ionic compounds are a. KCl, c. BaCl2 and e. LiF.

Regards.

7 0
3 years ago
If I have 3 liters of solute, and 4 liters of solvent how many liters in solution do I have?
yaroslaw [1]

Answer:

seven litres i

i.e three litres plus four litres

5 0
3 years ago
If the temperature of an object is 335 K, how would this be expressed on the Celsius scale?
Arturiano [62]

C it the correct answer

5 0
3 years ago
Selective breeding happens?
inysia [295]

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5 0
3 years ago
A 80.0 g piece of metal at 88.0°C is placed in 125 g of water at 20.0°C contained in a calorimeter. The metal and water come to
grandymaker [24]

Answer:

The specific heat of the metal is 0.485 J/g°C

Explanation:

<u>Step 1:</u> Data given

Mass of the piece of metal = 80.0 grams

Mass of the water = 125 grams

Initial temperature of the metal = 88.0 °C

Initial temperature of water =20.0 °C

Final temperature = 24.7 °C

pecific heat of water is 4.18 J/g*°C

<u>Step 2:</u> Calculate specific heat of the metal

Qgained = -Qlost

Q =m*c*ΔT

Qwater = - Qmetal

m(water)*c(water)*ΔT(water) = -m(metal)*c(metal)*ΔT(metal)

with mass of water = 125 grams

with c( water) = 4.18 J/g°C

with ΔT(water) = T2-T1 = 24.7 - 20 = 4.7°C

with mass of metal = 80.0 grams

with c(metal) = TO BE DETERMINED

with ΔT(metal) = 24.7 - 88.0 = -63.3 °C

125*4.18*4.7 = -80 * C(metal) * -63.3

2455.75 = -80 * C(metal) * -63.3

C(metal) = 2455.75 / (-80*-63.3)

C(metal) = 0.485 J/g°C

The specific heat of the metal is 0.485 J/g°C

3 0
4 years ago
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