CHEMISTRY COLLEGE

This is a pretty hard question. can someone help out?Correctly match the following vocabulary words with their definitions:

1. ___. the phase change of a substance from the solid state directly to the gaseous state; for example, dry ice, moth balls, or solid air freshener

2. _. a form of energy transferred (by way of conduction, convection, or radiation) by virtue of a difference in temperature; heat is energy in transit; heat is energy flow, measured in energy units

3. _. matter with definite volume and definite shape

4. _. theory in physics based on the fact that particles of matter are in vigorous motion and that the temperature of a substance increases with an increase in either the average kinetic energy of the particles or the average potential energy of separation of the particles, or in both, when heat is added

5. _. a measure of how hot or cold something is; a measure of the average kinetic energy of the particles of a substance

6. _. matter with no definite volume or shape

7. _. the process by which a gas changes phase directly to a solid; for example, the formation of frost

8. _. a gaslike state of matter consisting of positively charged ions, free electrons, and neutral particles; found in stars, the sun, solar wind, lightning, and fire; unlike gases, plasmas are good conductors of electrical currents

9. _. net absorption of energy

10. _. the transfer of heat through matter by way of the collision of molecules

11. _. heat; energy transferred due to temperature differential that becomes associated with potential energy and kinetic energy on a molecular level

12. _. the process by which water vapor changes from gas to liquid

13. _. in a closed system in changing from one form to another, matter and energy cannot be created or destroyed; in this sense, conservation means that the physical quantity of matter and energy is entirely preserved during transformations and reactions

14. _. physical form of matter, such as solid, liquid, and gas; a distinct state of matter in a system; matter that is identical in chemical composition and physical state, and is separated from other material by the phase boundary; for example, the reaction occurs in the liquid phase of the system

15. _. the process by which water changes to water vapor

16. _. net release of energy

17. _. SI-derived unit to measure energy, work, and quantity of heat; for work, a joule is the amount of work done by a force of 1 N acting through 1 m; also newton-meter

18. ___. matter with definite volume but no definite shape.

WORDS.

1.
condensation

2.
conduction

3.
conservation

4.
depostion

5.
endothermic

6.
evaporation

7.
exothermic

8.
gas

9.
heat

10.
joule

11.
kinetic theory

12.
liquid

13.
phase

14.
plasma

15.
solid

16.
sublimation

17.
temperature

18.
thermal energy

Answers

Answer 1

Answer:

Sublimation;
Heat*;
Solid;
Kinetic Theory;
Temperature;
Gas;
Deposition;
Plasma;
Endothermic;
Conduction;
Thermal Energy*;
Condensation;
Conservation;
Phase;
Evaporation*;
Exothermic;
Joule;
Liquid.

Consider looking up those definitions in a dictionary or in the appendix of your textbook.

Answer 2

Answer:

Answer is in the Word document.

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Answers

Answer:

Explanation:

What is the molarity of a solution prepared from 25.0 grams of methanol (CH3OH, density = 0.792 g/mL) with 100.0 milliliters of ethanol (CH3CH2OH)? Assume the volumes are additive.

Answers

Final answer:

The molarity of a solution prepared from 25.0 grams of methanol and 100.0 milliliters of ethanol is approximately 7.80 M.

Explanation:

This is a question about calculating molarity, which is a measure of concentration using moles per liter. To calculate the molarity of a methanol in ethanol, we first have to convert the mass of methanol into moles. The molar mass of methanol (CH3OH) is about 32.04 g/mol. Therefore, 25.0 g of methanol equals about 0.780 moles (25.0 g ÷ 32.04 g/mol).

Next, the volume of ethanol needs to be converted from milliliters to liters. Thus, 100.0 mL becomes 0.100 L. Finally, the molarity is calculated by dividing the moles of methanol by the volume of the ethanol in liters, resulting in a molarity of approximately 7.80 M (0.780 moles ÷ 0.100 L).

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PLZZZZZZZZZZZZ HELPPPPPPPPP BRAINLIEST FOR WHO GETS IT RIGHTTTTTTWhat is the mass of reactants in the following equation?N2 + 3H2 ----> 2NH3
Question 3 options:

34.05 amu

31.03 amu

30.02 amu

15.01 amu

Answers

Answer: 34.05

Explanation:

2N and 6H = abt 34

Which of the following reactions would have the smallest value of K at 298 K? Which of the following reactions would have the smallest value of K at 298 K? A + B → 2 C; E°cell = -0.030 V A + 2 B → C; E°cell = +0.98 V A + B → C; E°cell = +1.22 V A + B → 3 C; E°cell = +0.15 V More information is needed to determine.

Answers

The reactions that would have the smallest value of K is

A + B → 2 C; E°cell = -0.030 V

Option A

Generally the equation for the number of electrons transferred is mathematically given as

$nFE^o_(cell)=RT\ln K$

where

T= Temperature

F=25C(298K)

R = Gas constant

R= 8.314 J/K.mol

F = Faraday's constant

F= 96500 C

We see from the equation that the E-cell is directly proportional to K(equilibrium constant of the reaction)

Hence, The reactions that would have the smallest value of K is

A + B → 2 C; E°cell = -0.030 V

For more information on Reaction

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Answer:

The reaction with smallest value of K is :

A + B → 2 C; E°cell = -0.030 V

Explanation:

$nFE^o_(cell)=RT\ln K$

where :

n = number of electrons transferred

F = Faraday's constant = 96500 C

$E^o_(cell)$ = standard electrode potential of the cell

R = Gas constant = 8.314 J/K.mol

T = temperature of the reaction = $25^oC=[273+25]=298K$

$K$ = equilibrium constant of the reaction

As we cans see, that standard electrode potential of the cell is directly linked to the equilibrium constant of the reaction.

Higher $E^o_(cell)$ higher will be the value of K.
Lower $E^o_(cell)$ lower will be the value of K.

So, the reaction with smallest value of electrode potential will have smallest value of equilibrium constant. And that reaction is:

A + B → 2 C; $E^o_(cell) =-0.030 V$

What change would you expect on the rate of the SN2 reaction of 1-iodo-2-methylbutane with cyanide ion if the nucleophile concentration is halved and the alkyl halide concentration is unchanged ?

Answers

Answer:

Rate of reaction will be half of it's initial value

Explanation:

For the given $S_(N)2$ reaction, the rate law is -

$Rate=k[1-iodo-2-methylbutane][CN^(-)]$

Where k is rate constant, [1-iodo-2-methylbutane] is concentration of 1-iodo-2-methylbutane and $[CN^(-)]$ is concentration of $CN^(-)$

Here nucleophile is the $CN^(-)$ ion

Initiallly, $(Rate)_(initial)=k* [1-iodo-2-methylbutane]_(initial)* [CN^(-)]_(initial)$

When concentration of $CN^(-)$ is halved then-

$Rate=k* [1-iodo-2-methylbutane]_(initial)* ([CN^(-)]_(initial))/(2)=((Rate)_(initial))/(2)$

So rate of reaction will be half of it's initial value

Four beakers containing potassium nitrate dissolved in water are allowed to evaporate to dryness. Beakers 1 through 4 contain 2.3, 1.91, 5.985, and 0.52 g of dry potassium nitrate respectively. How many moles of potassium nitrate were recovered after the water evaporated?