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Tomtit [17]
3 years ago
10

A student observes that water in a pot on a burner becomes hotter explain how energy is conserved in the situation

Chemistry
1 answer:
Daniel [21]3 years ago
8 0

  • The water in the pot becomes hotter as a result of heat transfer.

  • <em>Energy can be transferred from a region to another , but there will still the same overall amount of energy</em> ( energy conservation)

  • When a pot containing water  is  placed on the stove and  heat is applied with the burner, there is a flow of heat from the burner to the water.

  • Heat will be transferred from the burner to the pot, then there will be transferred of heat from the pot to the water, the molecules there in the water  will be energized as a result of the heat transfer until the boiling point  is  reached.

  • Energy transfer can take place in three form, this could be conduction, radiation or convention.

  • Convention which is a cyclical process is the one that occurs in fluids only so as a result of convection , the water at the bottom will be heated and the molecules start moving and it will rise till it get to the water at the top of the pot.

<em>Therefore, the water is heated as a result of heat transfer.</em>

<em />

Learn more at : brainly.com/question/17858145?referrer=searchResults

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M<br> + e -&gt; M-1<br> This reaction represents
arlik [135]

Answer:

Reduction.

Explanation:

Reduction is the gain of electron.

8 0
4 years ago
A student titrates a 20.00 mL sample of an aqueous borax solution with 1.03 M H2SO4. If 2.07 mL of acid are needed to reach the
RSB [31]

Answer:

The concentration of the borax solution is 0.1066 M

Explanation:

Step 1: Dtaa given

Volume of a sample of aqueous borax solution = 20.00 mL = 0.020 L

Molarity of H2SO4  = 1.03 M

Volume of the H2SO4 = 2.07 mL = 0.00207 L

Step 2: The balanced equation

Na2B4O7*10H2O(borax) + H2SO4 ⇆ Na2SO4 + 4 H3BO3 + 5 H2O

Step 3: Calculate molarity of borax solution

b*Ca*Va = a * Cb*Vb

⇒with B = the coefficient of H2SO4 = 1

⇒with Ca = the concentration of borax = TO BE DETERMINED

⇒with Va = the volume of borax = 0.020 L

⇒with a = the coefficient of borax = 1

⇒with Cb = the concentration of H2SO4 = 1.03 M

⇒with Vb = the volume of H2SO4 = 0.00207 L

Ca*0.020 L = 1.03 M * 0.00207 L

Ca = (1.03 * 0.00207) / 0.020

Ca = 0.1066 M

The concentration of the borax solution is 0.1066 M

6 0
4 years ago
What is the ph of a soft drink in which the major buffer ingredients are 6.6 g of nah2po4 and 8.0 g of na2hpo4 per 355 ml of sol
Volgvan
First, we need to get the concentration of  [NaH2PO4]:
[NaH2PO4] =( mass / molar mass ) * volume L
when we have mass NaH2PO4 = 6.6 g & molar mass = 120g/mol & V = 0.355 L
So by substitution:
[NaH2PO4] = (6.6g / 120g/mol) * 0.355 L = 0.0195 M

then, we need to get the concentration of [Na2HPO4]:
[Na2HPO4]= (mass / molar mass ) * volume L
So by substitution:
[Na2HPO4] = (8g/ 142g/mol) * 0.355 L = 0.02 M

and when Pka of the 2nd ionization of phosphoric acid = 7.21 
So by substitution in the following formula, we can get the PH:

PH = Pka + ㏒[A]/[AH]

∴PH = 7.21 + ㏒[0.02]/[0.0195]
∴ PH = 7.2
4 0
4 years ago
Referencing the reasoning you used from #1, explain the difference between objects that feel hot and those that
dezoksy [38]

Answer:

The temperature of the cold water is lower than the warm one. So, when we put the hand in the warm from the cold water, our hand will absorb heat, causing the hand to feel hot. Thus, we can conclude that the more heat it absorbs, the more hotter it is. Whereas the more heat it releases, the colder it is.

6 0
3 years ago
If three neutrons are produced when a neutron bombards a U- 235 atom, determine the second fission product isotope when the firs
alexira [117]

Explanation:

235 U92 + 1n0 --> A + B + 3 1n0

when A = ;

(a) xenon-133

Mass number of B = 235 + 1 - 133 -3 = 100

Atomic number = 92 - 54 = 38

Element = Sr - Strontium

(b) barium-144

Mass number of B = 235 + 1 - 144 -3 = 89

Atomic number = 92 - 56 = 36

Element = Kr - Krypton

(c) cesium-143

Mass number of B = 235 + 1 - 143 -3 = 90

Atomic number = 92 - 55 = 37

Element = Rb - Rubidium

(d) tellurium-137

Mass number of B = 235 + 1 - 137 -3 = 96

Atomic number = 92 - 52 = 40

Element = Zr - Zirconium

(e) lanthanum-146

Mass number of B = 235 + 1 - 146 -3 = 87

Atomic number = 92 - 57 = 35

Element = Br - Bromine

8 0
4 years ago
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