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
andreyandreev [35.5K]
3 years ago
14

A silver cube with an edge length of 2.42 cm and a gold cube with an edge length of 2.75 cm are both heated to 85.4 ∘C and place

d in 112.0 mL of water at 20.5 ∘C . What is the final temperature of the water when thermal equilibrium is reached?
Chemistry
1 answer:
kakasveta [241]3 years ago
7 0

Answer:

Explanation:

Volume of silver cube = 2.42³ = 14.17 cm³

mass of silver cube = volume x density

= 14.17 x 10.49 = 148.64 gm

Volume of gold cube = 2.75³ = 20.8  cm³

mass of gold cube =  20.8 x 19.3 = 401.44 gm

specific heat of silver and gold are .24 and .129 J /g°C

mass of 112 mL water = 112 g

Heat absorbed = heat lost = mass x specific heat x temperature fall or rise

Heat lost by metals

= 148.64 x .24 x ( 85.4 -T) + 401.44 x .129 x ( 85.4 - T )

= (35.67 + 51.78 ) x ( 85.4 - T )

87.45 x ( 85.4 - T )

= 7468.23 - 87.45 T

Heat gained by water

= 112 x 1 x ( T - 20.5 )

= 112 T - 2296

Heat lost = heat gained

7468.23 - 87.45 T = 112 T - 2296

199.45 T = 9764.23

T = 48.95° C

You might be interested in
Which of the following would most likely cause a building to erode? A. acid rain B. the heat island effect C. heat pollution D.
Elena L [17]
Yeah it should be acid rain
3 0
3 years ago
What’s the answer!?!!
EastWind [94]

Answer: generic material and protein coat. Have a great day

Explanation:

3 0
3 years ago
The oceanic crust is made primarily from this type of rock. A) basalt B) halite C) granite D) limestone
masya89 [10]
The answer is A. Basalt rock.

7 0
3 years ago
HELP
Levart [38]

Answer:

C

Explanation:

8 0
2 years ago
Read 2 more answers
How does the law of definite proportions apply to hydrates?
vladimir1956 [14]
The law of definite proportions would state that a hydrate always contain exactly the same proportion of salt and water by mass.
strictly speaking, the law of definite proportion states that a compound always 
contains exactly the same proportion of elements by mass.
But the law is often applied to groupings of elements in compound.
Hydrates are salt that have a certain amount of  water asa part of their structure.
The water is chemically combined with the compound in a definite ratio.
4 0
2 years ago
Other questions:
  • What takes place during a redox reaction
    14·2 answers
  • A rock sample contains 4.5g of Potassium-40 and 31.5g of its daughter isotope (Argon-40). How old is the rock sample if Potassiu
    9·1 answer
  • Check all that apply to sugar.
    6·2 answers
  • Consider the reaction below 2SO2(g) + O2(g) ⇌ 2SO3(g) At 1000 K the equilibrium pressures of the three gases in one mixture were
    13·1 answer
  • A 1.0-L buffer solution is 0.10 M in HF and 0.050 M in NaF. Which action destroys the buffer? (a) adding 0.050 mol of HCl (b) ad
    15·1 answer
  • How do intermolecular forces help explain differences in phase changes (boiling point, melting point)
    15·1 answer
  • How many moles of electrons are required to reduce one mole of oxygen gas (O2) to two moles of oxygen ions (O2-)?
    5·2 answers
  • 86.64 g LiBr mol LiBr
    8·2 answers
  • The mass of an atom of element x is equivalent to the total mass of 7 hydrogen atoms.
    9·1 answer
  • Meaning of dot in a hydrate formula
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!