Ask question

Ask question

All categories

4 years ago

13

7. Which hypothesis about the fate of the universe says that all matter will be torn apart as the dark energy in space keeps acc

elerating faster and faster?
A. The Big Crunch
B. The Big Rip
C. The Big Bang
D. The Big Chill

1 answer:

sdas [7]4 years ago

8 0

The correct answer is C. The Big Bang

You might be interested in

Calculate Delta G for each reaction using Delta Gf values: answer kJ ...thank you

Leni [432]

Answer:

a) $\Delta G=2.6kJ$

b) $\Delta G=-979.57kJ$

c) $\Delta G=264.21kJ$

Explanation:

Hello,

In this case, in each reaction we must subtract the Gibbs free energy of formation the reactants to the Gibbs free energy of formation of the products considering each species stoichiometric coefficients. In such a way, the Gibbs free energy of formations are:

$\Delta _fG_{H_2}=\Delta _fG_{I_2}=0kJ/mol\\\Delta _fG_{HI}=1.3kJ/mol\\\Delta _fG_{CO_2}=-394.4kJ/mol\\\Delta _fG_{CO}=-137.3 kJ/mol\\\Delta _fG_{NH_3}=16.7 kJ/mol\\\Delta _fG_{HCl}=-95.3kJ/mol\\\Delta _fG_{MnO_2}=465.37kJ/mol\\\Delta _fG_{Mn}=0kJ/mol\\\Delta _fG_{NH_4Cl}=-342.81kJ/mol$

So we proceed as follows:

a)

$\Delta G=2\Delta _fG_{HI}-\Delta _fG_{H_2}-\Delta _fG_{I_2}\\\\\Delta G=2*1.3\\\\\Delta G=2.6kJ$

b)

$\Delta G=\Delta _fG_{Mn}+2*\Delta _fG_{CO_2}-\Delta _fG_{MnO_2}-2*\Delta _fG_{CO}\\\\\Delta G=0+2*-394.4-465.37-2*-137.3\\\\\Delta G=-979.57kJ$

c)

$\Delta G=\Delta _fG_{NH_3}+\Delta _fG_{HCl}-\Delta _fG_{NH_4Cl}\\\\\Delta G=16.7-95.3-(-342.81)\\\\\Delta G=264.21kJ$

Regards.

6 0

3 years ago

Which of these is a chemical property of a substance?

valentinak56 [21]

Color, the other answers arent changing the substance into something different

3 0

3 years ago

A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next fe

konstantin123 [22]

Answer:

it will dilute to its natrual state. so c

Explanation:

4 0

3 years ago

Read 2 more answers

Which of the following is the ultimate byproduct of weathering?

NikAS [45]

Soil
the answer is soil

6 0

3 years ago

Read 2 more answers

Based on the following chemical equation how many hydrogen atoms are present in the products side?

e-lub [12.9K]

Answer:

the answer is 6

Explanation:

there is 3 hydrogen molecules in NH3 and there's 2 molecules of NH3 so in total, there are 6 hydrogen molecules on the products side.

8 0

3 years ago