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3 years ago

How Do Glow Sticks Glow?

Chemistry

1 answer:

Gekata [30.6K]3 years ago

8 0

Answer:

All liquid glow products depend on a chemical process known as CHEMILUMINESCENCE to produce their light. Chemiluminesence is a chemical reaction that causes a release of energy in the form of light. To produce this light the electrons in the chemicals become excited and rise to a higher energy level.

To utilise this process glowsticks contain two liquids; hydrogen peroxide and tert-butyl alcohol. When mixed together it is these liquids that create the glow. Fluorescent dyes are also used in the alcohol to alter the colour of the light emitted.

Explanation:

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PtichkaEL [24]

By protecting Earth from damaging solar particles! :)

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3 years ago

A sample of gas has a volume of 125mL at 6.0 atm pressure. What will the new volume in mL be of the pressure is decreased to 0.2

Rasek [7]

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3 years ago

If there is 25.0 L of gas at a temperature of 350C what is the temperature if the volume increases to 75.0L?

Zielflug [23.3K]

Answer:

The new temperature is 1596 C.

Explanation:

Charles's Law indicates that for a given sum of gas at constant pressure, as the temperature increases, the volume of the gas increases, and as the temperature decreases, the volume of the gas decreases.

Statistically, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the ratio that exists between the volume and the temperature will always have the same value:

$\frac{V}{T}=k$

Being an initial state 1 and a final state 2, it is fulfilled:

$\frac{V1}{T1}=\frac{V2}{T2}$

In this case:

V1= 25 L
T1= 350 C= 623 K (being 0 C= 273 K)
V2= 75 L
T2= ?

Replacing:

$\frac{25 L}{623 K} =\frac{75 L}{T2}$

Solving:

$T2*\frac{25 L}{623 K} =75 L$

$T2=75 L*\frac{623 K}{25 L}$

T2= 1869 K= 1596 C

The new temperature is 1596 C.

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3 years ago

An aqueous HCL solution has a proton concentration equal to 6.00 mol/L. The HCL concentration in this solution is ————M.

Harman [31]

Answer:

HCl conc.= 6.0mol/L

Explanation:

From the dissociation of HCl= 1 mole H+ and 1mol Cl-, which is equivalent stoichiometrically in concentration to that of 1 mol HCl,

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3 years ago

An air-filled balloon has a volume of 225 L at 0.940 atm and 25 °C. Soon after, the pressure changes to 0.990 atm and the temper

lorasvet [3.4K]

Answer:

The right choice is V₂ = 195.7 L

Explanation:

We can use the general law of ideal gas: PV = nRT.

where, P is the pressure of the gas in atm.

V: is the volume of the gas in L.

n: is the no. of moles of the gas in mol.

R: is the general gas constant,

T: is the temperature of the gas in K.

If n is constant, and have different values of P, V and T:

(P₁*V₁) / T₁ = (P₂ * V₂) / T₂

Knowing that:

V₁ = 225 L , P₁ = 0.940 atm

T₁ = 25 °C + 273 = 298 K

V₂ = ??? L, P₂ = 0.990 atm

T₂ = 0 °C + 273 = 273 K

applying in the above equation

(P ₁* V₁) / T₁ = (P₂ * V₂) / T₂

(0.940 atm * 225 L) / 298 K= (0.990 atm * V₂) / 273 K

V₂ = (0.940 atm * 225 L * 273 K) / (298 K * 0.990 atm)

V₂ = 195.7 L

So, the right choice is:

V₂ = 195.7 L

7 0

3 years ago