3 years ago

"Rate" is related to...?

Chemistry

2 answers:

Delvig [45]3 years ago

8 0

Rate means time or represents time

astra-53 [7]3 years ago

4 0

time... i read it in the book

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If a gas is initially at a pressure of 9 atm, a volume of 21 liters, and a temperature of 253 K, and then the pressure is raised

alex41 [277]

Answer:

15.04 mL

Explanation:

Using Ideal gas equation for same mole of gas as

$\frac {{P_1}\times {V_1}}{T_1}=\frac {{P_2}\times {V_2}}{T_2}$

Given ,

V₁ = 21 L

V₂ = ?

P₁ = 9 atm

P₂ = 15 atm

T₁ = 253 K

T₂ = 302 K

Using above equation as:

$\frac {{P_1}\times {V_1}}{T_1}=\frac {{P_2}\times {V_2}}{T_2}$

$\frac {{9}\times {21}}{253}=\frac {{15}\times {V_2}}{302}$

Solving for V₂ , we get:

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3 years ago

PLEASE HELP WITH THESE TWO QUESTIONS

adelina 88 [10]

1. Q=112.8 kJ

2. Q=5.01 kJ

<h3>Further explanation</h3>

The heat required for phase change :

melting/freezing :

Q = mLf

Lf=latent heat of fusion

vaporization/condensation

Q = mLv

Lv=latent heat of vaporization

m=50 g=0.05 kg

Lv (water) = 2256 kJ/kg

$\tt Q=0.05\times 2256=112.8~kJ$

m=15 g=0.015 kg

Lf for water = 334 kj/kg

$\tt Q=0.015\times 334=5.01~kJ$

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I believe that it should be water evaporation

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Explanation:

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