2 years ago

What are some ways that solar energy is used?

Chemistry

2 answers:

mrs_skeptik [129]2 years ago

5 0

As heat for making hot water, heating buildings and cooking.

mestny [16]2 years ago

5 0

Answer:

this is the answer hope this will help you

You might be interested in

1. A fluid is a substance that (a) always expands until it fills any container; (b) is practically incompressible; (c) cannot be

meriva

Answer:

cannot remain at rest under the action of any shear force.

4 0

1 year ago

In which groups of the modern periodic table are very active metals and very active non-metals placed?

eimsori [14]

Answer:

group 1 and are called Alkali metals. Similarly, very active non-metals are placed in group 17

Explanation:

5 0

2 years ago

A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density?

Rzqust [24]

Answer: d=2.70 g/mL

I think

7 0

2 years ago

How many liters of nitrogen would be needed to react with 93.0 liters of hydrogen using the balance

zysi [14]

Answer:

7NH

Explanation:

3 0

3 years ago

The heat of reaction for the combustion of propane is –2,045 kJ. This reaction is: C3H8(g) +502 (g) 3CO2 (g) + 4H2O (g). Determi

Ede4ka [16]

Answer:

$\Delta _fH_{C_3H_8}=-102.7kJ/mol$

Explanation:

Hello,

In this case, we can consider that the given heat of combustion is indeed the heat of reaction since it corresponds to the combustion of propane, which is computed by using the heat formation of all the involved species as shown below:

$\Delta _cH=3*\Delta _fH_{CO_2}+4*\Delta _fH_{H_2O}-\Delta _fH_{C_3H_8}-5*\Delta _fH_{O_2}$

Thus, since the heat of formation of gaseous carbon dioxide is -393.5 kJ/mol, water -241.8 kJ/mol and oxygen 0 kJ/mol, the heat of formation of propane is:

$\Delta _fH_{C_3H_8}=3*\Delta _fH_{CO_2}+4*\Delta _fH_{H_2O}-5*\Delta _fH_{O_2}-\Delta _cH\\\\\Delta _fH_{C_3H_8}=3*(-393.5)+4*(-241.8)-5*0-(-2045)\\\\\Delta _fH_{C_3H_8}=-102.7kJ/mol$

Best regards.

8 0

2 years ago