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coldgirl [10]
3 years ago
8

Rose reviews the EPA website and finds a recommendation to use cold tap water for cooking instead of starting with warm water fr

om the tap. Why does the EPA site suggest using cold tap water for cooking instead of starting with warm tap water?
Chemistry
1 answer:
Nezavi [6.7K]3 years ago
4 0

The Environmental Protection Agency suggests using cold tap water for cooking instead of starting with warm tap water is because our drinking water is made out lead pipes, which is a serious risk to health.

Explanation:

  • Lead is found throughout  the environment in lead found in paint, air, soil,   food and water.
  • Lead can pose  a significant risk to your health  if too much of it enters your body.  
  • Lead enters drinking water primarily  as a result of the corrosion.
  • It also contains in materials containing lead like in the water distribution system and   household plumbing.
  • Lead in drinking rarely cause of lead poisoning can significantly increase a person’s total lead exposure.
  • In particular the exposure of infants who drink baby formulas  and concentrated juices that are  mixed with water.
  • EPA estimates  that drinking water can make up  to 20% or more of a person’s  total exposure to lead which is dangerous.
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a 125 g chunk of aluminum at 182 degrees Celsius was added to a bucket filled with 365 g of water at 22.0 degrees Celsius. Ignor
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<h3>Answer:</h3>

32.98°C

<h3>Explanation:</h3>

We are given the following;

Mass of Aluminium as 125 g

Initial temperature of Aluminium as 182°C

Mass of water as 265 g

Initial temperature of water as 22°C

We are required to calculate the final temperature of the two compounds;

First, we need to know the specific heat capacity of each;

Specific heat capacity of Aluminium is 0.9 J/g°C

Specific heat capacity of water is 4.184 J/g°C

<h3>Step 1: Calculate the Quantity of heat gained by water.</h3>

Assuming the final temperature is X°C

we know, Q = mcΔT

Change in temperature, ΔT = (X-22)°C

therefore;

Q = 365 g × 4.184 J/g°C × (X-22)°C

    = (1527.16X-33,597.52) Joules

<h3>Step 2: Calculate the quantity of heat released by Aluminium </h3>

Using the final temperature, X°C

Change in temperature, ΔT = -(X°- 182°)C (negative because heat was lost)

Therefore;

Q = 125 g × 0.90 J/g°C × (182°-X°)C

  = (20,475- 112.5X) Joules

<h3>Step 3: Calculating the final temperature</h3>

We need to know that the heat released by aluminium is equal to heat absorbed by water.

Therefore;

(20,475- 112.5X) Joules = (1527.16X-33,597.52) Joules

Combining the like terms;

1639.66X = 54072.52

             X = 32.978°C

                = 32.98°C

Therefore, the final temperature of the two compounds will be 32.98°C

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