As the temperature of a sample of matter is increased, what happens to the average kinetic energy of the particles in the sample?A. It decreases.
B. It increases.
C. It does not change.

Answers

Answer 1

Answer:

Answer:

B. It increases.

Explanation:

The kinetic energy is associated with the motion of the particles of a substance.

When the temperature increases, the movement will increase, which means that the velocity of the particles will increase.

According to the mathematical defenition of kinetic energy

$Ek = (1)/(2) mv^(2)$

The higher the velocity, the higher the kinetic energy.

If the matter is made by a monoatomic gas, the relation between the kinetic energy and temperature is even more evident:

$Ec = (3)/(2)(R)/(Na) T$

R: gas constant

Na: Avogadro's number

T: temperature

Answer 2

Answer: it would be
B. it increases.

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Which of the following circumstances will result in a reaction that is spontaneous only at low temperatures?A.) positive enthalpy change and positive entropy change
B.) negative enthalpy change and negative entropy change
C.) positive enthalpy change and negative entropy change
D.) negative enthalpy change and positive entropy change

Answers

Answer: B.) negative enthalpy change and negative entropy change

Explanation:

According to Gibb's equation:

$\Delta G=\Delta H-T\Delta S$

$\Delta G$ = Gibbs free energy

$\Delta H$ = enthalpy change

$\Delta S$ = entropy change

T = temperature in Kelvin

$\Delta G$ = +ve, reaction is non spontaneous

$\Delta G$ = -ve, reaction is spontaneous

$\Delta G$ = 0, reaction is in equilibrium

Thus when $\Delta H$ = -ve

$\Delta S$ = -ve

$\Delta G=(-ve)-T(-ve)$

$\Delta G=(-ve)(+ve)=-ve$ only at low temperature

Reaction is spontaneous only if temperature is low.

D) negative enthalpy and positive entropy,
since the formula G=H-TS when a reaction is spontaneous then G must be negative, and if values of t are low then the only time it is guaranteed to be a negative G value is if H is positive and S is negative

Why is H2SO4 regarded as an ampholyte

Answers

I think sulfuric acid cannot be regarded as an ampholyte. Ampholytes are amphoteric molecules or that contains both acidic and basic groups. An amphoteric compound can react both as an acid and a base which sulfuric acid is not capable.

Which of the following is least likely to form bonds? helium hydrogen nitrogen oxygen

Answers

Answer: Helium is least likely to form bonds.

Explanation:

Helium has the electronic configuration $1s^(2)$ . As the 1s sub-shell is completely filled so there is no need for helium to form bonds with other atoms.

Whereas, nitrogen has the electronic configuration $1s^(2) 2s^(2) 2p^(3)$ . As the p sub-shell is half filled, it has the tendency to accept more electrons. Therefore, nitrogen is more susceptible to form bonds as compared to helium.

Thus, it is concluded that helium is least likely to form bonds.

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