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lidiya [134]
3 years ago
11

The thermal energy in a heat engine is used to move a piston. Which best describes why this is possible?

Chemistry
2 answers:
Mice21 [21]3 years ago
6 0
Heat engines burn fuel to create heat. The process of burning fuel involves a chemical reaction called combustion where fuel burns in oxygen in the air to produce carbon dioxide and steam. In external combustion engines, for example, coal is burned to heat water. The steam produced is piped into a strong metal cylinder which moves a tight-fitting plunger called a piston. The back and forth movement of the piston then powers whatever engine it is attached to.
Ne4ueva [31]3 years ago
3 0

These are the choices.


The increase in thermal energy results in an increase in pressure.

The decrease in thermal energy results in an increase in pressure.

The increase in thermal energy results in a decrease in pressure.

The decrease in thermal energy results in a decrease in pressure.

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What is the primary cause of global wind patterns on earth?
dedylja [7]
Uneven heating of the Earth's surface also forms large global wind patterns. In area near the equator, the sun is almost directly overhead for most of the year. Warm air rises at the equator and moves toward the poles. At the poles, the cooler air sinks and moves back toward the equator.
3 0
4 years ago
Do cells have atoms?
Svetradugi [14.3K]

Answer:

Ye? everything is made up of atoms so sure

7 0
3 years ago
What is the mass of the hydrogen peroxide that exactly fills a 200.0 mL container? The density of ethyl alcohol is 0.789 g/mL.
Tom [10]

Answer:

290 g of hydrogen peroxide would fill the 200.0 mL container

Explanation:

Given data:

Volume = 200.0 mL  

Mass of hydrogen peroxide = ?

Solution:

Density of hydrogen peroxide is 1.45 g/cm³.

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

Now we can determine the mass of hydrogen peroxide.

D = m/v

1.45 g/cm³ = m/ 200.0 mL

1 mL = 1 cm³

m = 1.45 g/cm³× 200.0 cm³

m = 290 g

So 290 g of hydrogen peroxide would fill the 200.0 mL container.

5 0
4 years ago
A student successfully neutralizes 25.0mL of HCl(aq) during a titration experiment with 18.5mL of 0.150M NaOH(aq). What is the c
son4ous [18]

Answer:

The concentration is 0.111 M.

Explanation:

Use dimensional analysis to solve the problem. Since both HCl and NaOH are strong, the dissociate completely in solution.

For this neutralization, the reaction is HCl + NaOH = NaCl + HOH

18.5 mL x \frac{1 L}{1000 mL} x \frac{0.150 moles NaOH}{1 L} x \frac{1 mole HCl}{1 mole NaOH} = 0.002775 moles HCl

Molarity = moles/ Liters

Molarity of HCl = 0.002775 moles HCl / 0.025 L = 0.111 M

5 0
3 years ago
True or false: If the pressure is constant, as the temperature of a gas increases the volume increases.
DerKrebs [107]

Answer:

False.

Explanation:

Because if there is more space in the container for the gas to move, there is less pressure.  There would be a decrease in the pressure

3 0
3 years ago
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