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3 years ago

I need help on 4-6 pleasee

Chemistry

1 answer:

GenaCL600 [577]3 years ago

6 0

4. It is an endothermic process. The body of someone taking a shower would be absorbing heat from the environment, another example of this would be cooking an egg

5. Ice melting is endothermic. The ice is absorbing heat from the environment, water freezing would be an exothermic reaction as it is transferring heat into the environment

6 however i do not have an answer for. I may just be a little dense but I'm not entirely sure what it is asking when it asks what the system is.

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Thermodynamic PropertiesProperty Value

igomit [66]

Answer:

1,620 J.

Explanation:

The amount of heat added to a substance (Q) can be calculated from the relation:

Q = m.c.ΔT.

where, Q is the amount of heat released from ethanol cooling,

m is the mass of ethanol (m = 60.0 g),

c is the specific heat of ethanol in the liquid phase, since the T is cooled below the boiling point and above the melting point (c = 1.0 J/g °C),

ΔT is the temperature difference (final T - initial T) (ΔT = 43.0 °C – 70.0 °C = - 27.0 °C).

∴ Q = m.c.ΔT = (60.0 g)(1.0 J/g °C)(- 27.0 °C) = - 1620 J.

The system releases 1620 J.

8 0

3 years ago

What questions, if we were to answer them, would

Margarita [4]

Answer:

When our bodies are dry and wind blows by, we lose some energy to the air molecules. When are bodies are wet, we have a substance on our skin that likes to absorb heat. So when wind blows by, we lose a LOT of energy to the air molecules. When the body loses heat energy, our body temperature drops.

Explanation:

hope it helps

plzz mark it as brainliest...

7 0

3 years ago

What is the difference between a solid and a gas

dem82 [27]

Answer:

Gas is for example oxygen or the air we breath and liquid is water.

Explanation:

6 0

3 years ago

Read 2 more answers

A (blank) is a solution with as much dissolved solute as it can hold at a given temperature.

Nookie1986 [14]

Saturated solution i think

4 0

3 years ago

Homelearning

kirill115 [55]

Answer:

Number of moles of Fe = 10 mol

Number of moles of CO₂ = 15 mol

Explanation:

Given data:

Number of moles of iron oxide = 5 mol

Number of moles of carbon monoxide = 25 mol

Number of moles of product = ?

Solution:

Fe₂O₃ + 3CO → 2Fe + 3CO₂

Now we will compare the moles of reactant with product.

Fe₂O₃ : Fe

1 : 2

5 : 2×5 = 10 mol

Fe₂O₃ : CO₂

1 : 3

5 : 3×5 = 15 mol

CO : Fe

3 : 2

25 : 2/3×25 = 16.7 mol

CO : CO₂

3 : 3

25 : 25

Less number of moles of Fe and CO₂ are formed by iron oxide thus it will act as limiting reactant while CO is inn excess.

4 0

3 years ago