1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
NeTakaya
3 years ago
7

How much energy is required to change the temperature of 35.0 g of Lead

Chemistry
1 answer:
Nezavi [6.7K]3 years ago
7 0

Answer:

Q = 270 Joules (2 sig. figs. as based on temperature change.)

Explanation:

Heat Transfer Equation of pure condensed phase substance => Q = mcΔT

Mixed phase (s ⇄ l melting/freezing, or l ⇄ g boiling/condensation) heat transfer equation => Q = m∙ΔHₓ; ΔHₓ = phase transition constant

Since this is a pure condensed phase (or, single phase) form of lead (Pb°(s)) and not melting/freezing or boiling/condensation, one should use

Q = m·c·ΔT

m = mass of lead = 35.0g

c = specific heat of lead = 0.16J/g°C

ΔT = Temp change = 74°C - 25°C = 49°C

Q = (35.0g)(0.16J/g·°C )(49°C) = 274.4 Joules ≅ 270 Joules (2 sig. figs. as based on temperature change.)

You might be interested in
The physical and chemical properties of a molecule depend on its structure. Here are two ball-and-stick models for two compounds
djyliett [7]

Answer:

Ethanol has covalent intramolecular bonds. Ethanol is polar. Ethanol has dispersion intermolecular forces. Dimethyl ether is polar. Dimethyl ether forms hydrogen bonds. Dimethyl ether has dispersion intermolecular forces.

Explanation:

Ethanol is not a carboxylic acid. It is an alcohol and it has covelent intramolecular bonds. It is polar and it also has dispersion intermolecular forces.

Dimethyl ether is also polar and it has forms hydrogen bonds. It also has dispersion intermolecular forces. Dimethyl ether does not have ionic intramolecular forces

7 0
3 years ago
Read 2 more answers
What is the element for Trifluoroborane
Harlamova29_29 [7]

<span>Ethoxyethane; trifluoroborane; BF3.Et2O; Boron trifluoride ethyl ether; Boron trifluoride diethyl ether; Boron trifluoride-diethyl ether; Boron 

</span>
7 0
3 years ago
The value of Zeff for a valence electron in an atom of silicon is?
lutik1710 [3]

Zeff is the effective nuclear charge wherein, Z resembles the number of protons in the nucleus while S corresponds to the number of non-valence electrons.

Zeff = Z - S

Silicon has 14 protons; its electron configuration is [Ne] 3s2 3p2. Its non-valence electrons is in the n = 1 and n =2 shells. There are 2 electrons in n = 1 and 8 in n = 2, so there are a total of 10 non-valence electron.

<span><span>Z<span>eff</span></span>= 14−10= 4</span>

So, the answer is 4.
6 0
2 years ago
Which of the following results in a chemical change in matter?
kodGreya [7K]
You have a raw egg you put it in a hot pan boom cooked egg most chemical changes are nonreversibal <span />
7 0
3 years ago
What is on the periodic table of elements? *<br> Molecules<br> O<br> Elements
alexandr1967 [171]

answer: elements are on the periodic table

8 0
2 years ago
Other questions:
  • A 12.8 g piece of aluminum (which has a molar heat capacity of 24.03 j/°c·mol) is heated to 82.4°c and dropped into a calorimete
    13·1 answer
  • In what unit is formula mass expressed?
    5·1 answer
  • 2. Calculate the standard emf of a cell that uses the Mg/Mg+2 and Cu/Cu+2 half-cell reactions at 25ºC. Write the equation for th
    9·1 answer
  • Do anyone know the answer please
    15·1 answer
  • Chromium crystallizes with a body-centered cubic unit cell. The radius of a chromium atom is 125 pm . Calculate the density of s
    14·1 answer
  • Rachel is using a Bunsen burner to heat a solution. Which of the following would let her control the rate of reaction in the sol
    15·2 answers
  • Solid calcium hydroxide is dissolved in water until the pH of the solution is 10.44. Determine the concentration of the calcium
    10·1 answer
  • Lithium Nitride is a ionic bonded compound because?
    12·1 answer
  • I need 11 12. 13. 14. 15. And 16 please and thank you ❤
    14·1 answer
  • You are a doctor examining a bone sample taken from a patient with weak bones you find out the bone tissue contains many small p
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!