6. Explain why the boiling point of water is a characteristic physical property, but the temperature and volume of a glass of water are not.
Answers
The physical property is a physical characteristic of a substance at some given conditions
for example
The density of water is 1 g/ mL at STP
The boiling point of water is 373K at 1 atm pressure
so boiling point of water is its physical property. It does not change with amount of the substance. The boiling point of water will remain the same for 1g and 1kg etc
now temperature is an instant measurement, the temperature may vary from sample to sample. Some water sample can be cool or some can be hot. So we cannot define that temperature of all water sample at a given pressure will be the same.
similarly the volume is a not a physical property. It will change from amount to amount.
1g of water sample will have different volume and 100g of water will have different volume while the density of water will remain the same.
When you are boiling water, you are changing its state to go from a liquid to a gas. The temperature is not a characteristic physical property because it doesn't help us know a lot about that substance, in other words, it isn't significant to the substance. Same goes for volume.
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The equation A + BX = AX + B is the general equation for a...a. double-replacement reaction. c. replacement reaction. b. decomposition reaction. d. combustion reaction.
List three of Rutherford’s major achievements that helped earn him the title “Father of Nuclear Physics.”
B. less than
C. greater than
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Answers
Answer: The Sun is present in the center of solar system whose features are color, mass and texture.
Explanation:
Our solar system consists of one star and 8 planets. The star is present in our solar system is the Sun and due to this star only, our solar system is named as such.
The planets present in our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
These planets revolve around the star which is present at the center of the solar system.
Three physical features of Sun are:
- Color: The color of Sun is yellow.
- Mass: The mass of the Sun is
- Texture: Due to the convectional currents, the texture of the whole surface of sun is granular.
Hence, the Sun is present in the center of solar system whose features are color, mass and texture.
sinks. Explain the difference.
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let it go while a balloon filled with carbon dioxide
sinks. This is because the gases inside the balloons have different densities. Both gases have different densities where one is lighter than air (Helium) and the other is heavier than air (CO2).
endothermic and exothermic reactions.
4
O Endothermic reactions absorb heat
energy while exothermic reactions
release heat energy.
O Exothermic reactions absorb heat
energy while endothermic reactions
release heat energy.
O Endothermic and exothermic reactions
absorb thermal energy.
O Endothermic and exothermic reactions
release thermal energy.
REM
The prefix exo-
applied to a che
mean energy
re
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Statement-1 is the correct answer that is Endothermic reactions absorb heat energy while exothermic reactions release heat energy.
How can we distinguish between exothermic and endothermic processes?
Chemical reactions that release energy are referred to as exothermic. More energy is produced than is needed to break the bonds between the reactants when bonds are formed in the byproducts of exothermic processes.
Chemical processes that either use or absorb energy are referred to as endothermic. In endothermic reactions, more energy is absorbed when bonds in the reactants are broken than is released when new bonds are formed in the products. Since an isothermic chemical reaction uses exactly as much energy as it produces, there is no net energy change.
Therefore, the first statement is the right response.
To know more about exothermic, check out:
#SPJ1
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Carbon-12 Atom is correct :)
atomic nuclei
c.
products
b.
reactants
d.
energy
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The nucleus is the small, dense region consisting of protons and neutrons at the center of an atom. The atomic nucleuswas discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment.