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3 years ago

12

Even if you used the right specific heat (c) and temperature change (∆T) for ice, for liquid, and for steam, it does not give yo

u the total amount of energy required for this problem. What is still missing, and explain why that requires energy!

1 answer:

vodka [1.7K]3 years ago

4 0

Answer: Heat of melting s = 333 kJ/kg and heat of vaporisation r= 2160 kJ/kg

Explanation:

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Hydrogen bond is an example for? (PLEASE HELP!)

zlopas [31]

Answer:

b)

Explanation:

hydrogen bond is a form of dipole-dipole interaction but with more unique properties

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3 years ago

PLEASE HELPP!!!!

Natasha_Volkova [10]

Answer:

<em>The combined law is:</em>

$\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}$

See the derivation below.

Explanation:

<em><u>1. Boyle's law:</u></em>

$PV=constant\\\\P_1V_1=P_2V_2$

<em />

<u><em>2. Charles' law:</em></u>

$\dfrac{V}{T}=constant\\\\\\\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}$

<em><u>3. Gay-Lussac’s law</u></em>

$\dfrac{P}{T}=constant\\\\\\\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}$

<u>4. Summary:</u>

PV = K

V/T = K'

P/T = K''

Mulitply PV by V/T and P/T

$PV\times \dfrac{V}{T}\times \dfrac{P}{T}=K\times K'\times K''\\\\\\\dfrac{P^2V^2}{T^2}=constant\\\\\\\sqrt{\dfrac{P^2V^2}{T^2}}=\sqrt{constant}\\\\\\\dfrac{PV}{T}=constant$

Thus:

$\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}$

Which is<em> the combined law.</em>

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4 years ago

Of the molecules below, the bond in __________ is the most polar. hbr hi hcl hf

Black_prince [1.1K]

<span>There's a trend in electronegativity. The bottom left of periodic table is the lowest (0.7) and the upper right is the highest (4.0). The most polar is the greatest difference in electronegavity. hbr- 1~ , hi- 0.5~ ,hcl - 1.3~ , hf-1.8 so,hf is the answer</span>

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3 years ago

What is the ratio of oxygen to carbon dioxide? 2 C2H6+7 O2=6 H2O+4CO2

ArbitrLikvidat [17]

Answer:

7:4

Explanation:

The coefficients of a balanced chemical equation give us the mole ratios. The coefficient of carbon dioxide here is 4 and oygen is 7.

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3 years ago

How many grams of H20 are created from 1.3 liters of H2?

galben [10]

I am very very sorry for sharing 4t so please can u send me the same question again

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2 years ago