a cylinder of oxygen gas is cooled from 300K to 150K by what factor does the average kinetic energy of the oxygen molecules in the cylinder decrease
Answers
Answer:
The factor by which the average kinetic energy of the oxygen molecules in the cylinder decreases is '0.5'.
Explanation:
Average kinetic energy is defined as the average of the kinetic energies of all the particles present in a system. It is determined by the equation:
where,
K = Average kinetic energy
R = Gas constant
T = Temperature of the system
= Avogadro's number
Average kinetic energy of oxygen gas molecule at 300 K.
..[1]
Average kinetic energy of oxygen gas molecule at 150 K.
..[2]
[1] ÷ [2]
The factor by which the average kinetic energy of the oxygen molecules in the cylinder decreases is '0.5'.
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hope this helps!
Answers
According to Gay -Lussac's law, the pressure of the can if it is heated to 1270°C is 4295.53 mm Hg.
What is the Gay-Lussac's law?
It is defined as a gas law which states that the pressure which is exerted by the gas directly varies with its temperature and at a constant volume.The law was proposed by Joseph Gay-Lussac in the year 1808.
The pressure of the gas at constant volume reduces constantly as it is cooled till it undergoes condensation .If a graph of pressure versus temperature is plotted it is a straight line which passes through the origin .
The equation is given as, P₁/T₁=P₂/T₂
On substitution of values as ,P₁=760 mm Hg,T₁=273 K,T₂=1543 K
P₂=1543×760/273=4295.53 mm Hg.
Thus, the pressure of gas is 4295.53 mm Hg if it is heated up to 1270°C.
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760/303=P2/1428
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1) CCl4
2)SiO2
3)C6H12O6
4) H2SO4
Answers
The substance that has been acting as an electrolyte from the given molecules is sulfuric acid. Thus, option 4 is correct.
Electrolytes have been defined as the chemical substances that has been dissociated into constituent ions when dissolved in the aqueous solution.
Identifying electrolytes
The ionic compounds are bounded by weak intermolecular forces and are dissociated into ions in the solution. Thus, the compounds are given as electrolytes.
The covalent bonded molecular atoms are not dissociated into ions and are not considered as electrolytes.
The substance that has been acting as an electrolyte from the given molecules is sulfuric acid. Thus, option 4 is correct.
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CCl₄ (Tetrachloromethane) is a covalent compound. And it doesn't dissociate to any cation or anion. So it is not electrolyte.
SiO₂ (Silicon Dioxide) is also covalent in nature and exist in giant framework. It is not electrolyte.
Glucose (C₆H₁₂O₆) is also covalent compound. And doesn't produced any ion in water, hence it is not electrolyte.
H₂SO₄ (Sulfuric acid) is Electrolyte. When it is dissolved in water it produces H⁺ and SO₄²⁻ ions as follow,
H₂SO₄ → 2 H⁺ ₍aq₎ + SO₄²⁻ ₍aq₎
Result:
H₂SO₄ is electrolyte.
b. ivy growing around the pole of a fence
c. the angle of the sun changing during the day
d. outside temperature dropping at night
Answers
acceptor
(B) acceptor
(C) donor
(D) donor
Answers
(2) the loss of electrons
(3) the gain of protons
(4) the gain of electrons
Answers
The process that occurs here in the anode of an electrochemical cell is the loss of electrons (Option 2).
What is an anode?
An anode is a negative pole that is known to be polarized in the electrochemical device of a given outside circuit.
- Conversely, the cathode is the positive pole where electrons flow in a given current.
In conclusion, the process that occurs here in the anode of an electrochemical cell is the loss of electrons (Option 2).
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The process that occurs at the anode in an electrochemical cell is the loss of electrons. The answer is number 2. Oxidation occurs as electrons are lost at the anode at one of the electrodes in both an electrolytic cell and a voltaic cell.