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3 years ago

What happens to the blood which reaches the cells from the capillaries?

1 answer:

5 0

The blood the reaches the cells from the capillaries food and O2 pass to cells, CO2 and wastes pass to blood. The rest of the choices do not answer the question above.

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How many Joules are released to cool 250.0 grams of liquid water from 100°C to 0°C? The specific heat of water is 4.180 J/g.C.

nlexa [21]

$\bold{\huge{\orange{\underline{ Solution}}}}$

$\bold{\underline{ Given :- }}$

We have 250g of liquid water and it needs to be cool at temperature from 100° C to 0° C
Specific heat of water is 4.180J/g°C

$\bold{\underline{ To \: Find :- }}$

We have to find the total number of joules released.

$\bold{\underline{ Let's \:Begin:- }}$

We know that,

Amount of heat energy = mass * specific heat * change in temperature

That is, 

$\sf{\red{ Q = mcΔT }}$

Subsitute the required values in the above formula :-

$\sf{ Q = 250 × 4.180 ×(0 - 100 )}$

$\sf{ Q = 250 × 4.180 × - 100 }$

$\sf{ Q = 250 × - 418}$

$\sf{\pink{ Q = - 104,500 J }}$

Hence, 104,500 J of heat is released to cool 250 grams of liquid water from 100° C to 0° C.

$\bold{\underline{ Now :- }}$

We have to tell whether the above process is endothermic or exothermic :-

Here, In the above process ΔT is negative and as a result of it Q is also negative that means above process is Exothermic

Exothermic process :- It is the process in which heat is evolved .
Endothermic process :- It is the process in which heat is absorbed .

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1 year ago

What is the predicted change in the boiling point of water when 2.10 g of

daser333 [38]

Answer:

A: 0.0028°C

Explanation:

Hopefully this helps!

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2 years ago

Hurry I need the answer asap

olga nikolaevna [1]

Answer:

Heat or electricity in the atmasphere

Explanation:

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2 years ago

What are hydrated substances

Keith_Richards [23]

Answer:

Glauber's salt

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2 years ago

What alkene(s) would be produced from the dehydration of cyclopentanol? (enter "none" in the unused blanks.)

amm1812

Dehydration of Alcohols yield Alkenes. Depending upon the starting material (alcohols) different alkenes are being formed either by following saytzeff rule or Hoffman rule. In case of Cyclopentanol only one alkene is produced (i.e. Cyclopentene) as shown below.

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2 years ago