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3 years ago

How many individual atoms are represented in the reactants of the equation shown below?

Chemistry

1 answer:

Soloha48 [4]3 years ago

6 0

Answer:

There are 8 hydrogen atoms on the product side in the reaction.

Explanation:

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Ethanol (c2h5oh) melts at -114Â°c. the enthalpy of fusion is 5.02 kj/mol. the specific heats of solid and liquid ethanol are 0.9

Nimfa-mama [501]

Answer: 4.18925 kJ heat is needed to convert 25.0 g of solid ethanol at -135 °C to liquid ethanol at -50°C.

Explanation:

Temperature of Solid $C_2H_5OH=-135^oC=138 K(0^oC=273K)$

Melting temperature of Solid $C_2H_5OH=114^oC=159 K$

Temperature of liquid $C_2H_5OH=-50^oC=223K$

Specific heats of solid ethanol = 0.97 J/gK

Specific heats of liquid ethanol = 2.3 J/gK

Heat required to melt the the 25 g solid $C_2H_5OH$ at 159 K

$\Delta T_1$ = 159 K - 138 K = 21 K

$Q_1=mc\Delta T= 25\times 0.97J/gK\times 21 K=509.25 J$

Heat required to melt and raise the temperature of $C_2H_5OH$ upto 223 K

$\Delta T_2$ = 223 K - 159 K = 64 K

$Q_2=mc\Delta T= 25\times 2.3J/gK\times 64 K=3680 J$

Total heat to convert solid ethanol to liquid ethanol at given temperature :

$Q_1+Q_2=509.25 J+3680 J=4189.25 J=4.18925 kJ$ (1kJ=1000J)

Hence, 4.18925 kJ of heat will be required to convert 25.0 g of solid ethanol at -135 °C to liquid ethanol at -50°C.

6 0

3 years ago

The growth rate is the death rate minus the birth rate these change because birth rates and

zysi [14]

Answer:

Hey there!

False. The growth rate is actually the birth rate minus the death rates.

Let me know if this helps :)

4 0

3 years ago

Question 6: what do i fill in the blank space? what are the units?

Arte-miy333 [17]

Answer:

I don't know chemistry

Explanation:

because this is the hardest subject in the world nobody can solve it so do yourself ok Beta

3 0

3 years ago

Read 2 more answers

Convert 3841 cL to L. SHOW WORK PLS

barxatty [35]

Answer:

1 cl = 1 * 10-5 m³

1 L = 1 * 10-3 m³

1 L = 0.001 m³

1 m³ = (1/0.001) L

1 m³ = 1000 L

1 cl = 1 * 10-5 * 1000 L

1 cl = 0.01 L

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2 years ago

If the number of atoms of each element on the reactant side of an equation is equal to the number of atoms of each element on th

cricket20 [7]

C. Is your answer hope you have a wonderful day

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3 years ago