What is the work done when a volume increases from 3 litersto 5 liters at 6 atm of pressure? (Conversion factor: 1 L atm = 100))
Answers
Answer:
-1215.9J is the work done
Explanation:
It is possible to find work done in the change of volume of a gas at constant pressure using:
W = -P×ΔV
Where W is work, P is pressure and V is change in volume}
Replacing:
W = -6atm×(5L-3L)
W = -12atmL
As 1atmL = 101,325J, work done in joules is:
-12atmL ×(101.325J / atmL) = -1215.9J is the work done
The value of work done when a volume increases from 3 liters to 5 liters at 6 atm of pressure is -1215.9 Joules.
How do we calculate workdone?
Workdone on any boby or by the body will be calculated as:
W = -P×ΔV, where
W = workdone
P = applied or exerted pressure = 6 atm
ΔV = change in volume due to workdone = (5-3) L
Negative sign in the formula shows that work is done on the opposite side of the pressure or volume.
On putting all these values on the above equation, we get
W = -6atm × (5L-3L)
W = -12 atmL
We know that, 1 atmL = 101,325 J,
So, workdone in joules will be written as:
-12 atmL × (101.325J / atmL) = -1215.9 J
Hence, -1215.9 J is the workdone.
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Answers
The mass percent of sodium in NaCl can be determined by dividing the mass of sodium by the total mass of the compound (NaCl), then multiplying the result by 100. So, 39.34% of the mass of sodium in NaCl is composed of sodium.
The molecular weight of chlorine (Cl) is 35.45 g/mol while that of sodium (Na) is 22.99 g/mol.
The molecular weight of NaCl is calculated as follows:
- Na: 1 atom * 22.99 g/mol = 22.99 g/mol
- Cl: 1 atom * 35.45 g/mol = 35.45 g/mol
Total molecular weight = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol
To determine the sodium mass percent in NaCl:
(mass of sodium / total mass of NaCl) * 100 to get the mass percent of sodium.
(22.99 g/mol / 58.44 g/mol) x 100 = 39.34% sodium mass percent
As a result, 39.34% of the mass of sodium in NaCl is composed of sodium.
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Therefore the percent mass of sodium in NaCl is 39.3%
I hope this helps. Let me know if anything is unclear.
CaSO3 (s) → → → → CaO (s) + SO2 (g) What mass of CaSO3 must have been present initially to produce 14.5 L of SO2 gas at a temperature of 12.5°C and a pressure of 1.10 atm?
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Answers
Potassium sulphide has the chemical formula S .
What do you mean by Chemical formula ?
A chemical formula is a phrase that lists the constituent parts of a compound together with their relative proportions. No subscript is used if there is just one atom of a certain kind.
Alkali metals in Group 1A produce plus-one ions because they wish to give up their valence electron in their outer shell.
In order to have a complete octet in its outermost shell, sulphur, which is found in the chalcogens, needs to gain two electrons.
Thus, Potassium sulphide has the chemical formula S .
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This is some kind of is the electrostatic attraction between polar molecules that occurs when a hydrogen (H) atom bound to a highly electronegative atom such as nitrogen (N), oxygen (O) or fluorine (F)... see image below! ;-)
Final answer:
The intermolecular forces that exist between molecules of NH3, H2O, and HF are hydrogen bonding, dipole-dipole interactions, and London dispersion forces.
Explanation:
The intermolecular forces that exist between molecules of NH3, H2O, and HF are called hydrogen bonding, dipole-dipole interactions, and London dispersion forces. Hydrogen bonding occurs between a hydrogen atom bonded to a highly electronegative atom (such as O, N, or F) and a lone pair of electrons on a nearby molecule. Dipole-dipole interactions occur between molecules with permanent dipole moments, while London dispersion forces occur due to the temporary formation of induced dipoles in adjacent molecules.
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Answer and explanation;
Coal has aromatic hydrocarbons with high molar mass and has a high ratio of carbon to hydrogen. Burning coal produces more soot than burning other fossil fuels does because of it.
Fossil fuel mixtures of hydrocarbons that formed from the remains of plants or animals. Burning fossil fuels increases the amount of carbon dioxide in the atmosphere. This increase may affect temperatures, amounts of rain and sea levels worldwide. Some sulfur and nitrogen are in fossil fuels, and air contains nitrogen.
Final answer:
Coal produces more soot than other fossil fuels as it is a carbon-rich fossil fuel, where some carbon atoms form soot particles during burning. The combustion of coal is less efficient, producing more particulates and carbon dioxide per unit energy output, thus contributing to air pollution and global warming.
Explanation:
Coal typically produces more soot than other fossil fuels when burned due to its composition. Unlike natural gas or oil, coal is a carbon-rich fossil fuel. When this carbon burns, it reacts with oxygen to form carbon dioxide, but not all carbon atoms complete this reaction. Some form tiny carbon particles or soot instead. These soot particles consist of amorphous carbon, which has a disorganized and complex structure, leading to the dark, dust-like quality of soot.
Historically, the burning of coal was ubiquitous in the Industrial Age, leading to severe air pollution with coal soot covering surfaces in industrial cities. This is because the combustion of coal is less efficient than other fossil fuels, producing more particulates and carbon dioxide per unit energy output. Consequently, the combustion of fossil fuels, and coal in particular, contributes to the greenhouse effect and global warming. In fact, coal-fired power plants produce the greatest amount of CO₂ per unit energy output compared to natural gas or oil, making it the least efficient fossil fuel in terms of greenhouse gas emissions.
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