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
Sedaia [141]
3 years ago
7

Which sample is most likely to undergo the smallest change in temperature upon the absorption of 100 kJkJ of heat

Chemistry
1 answer:
lapo4ka [179]3 years ago
4 0

Answer:

Corresponde a la sesi�n de GA 4.5 UN PEQUE�O AUMENTO

La dilataci�n se define como el aumento de las dimensiones de un cuerpo cuando �ste absorbe calor. A excepci�n del agua, que se contrae cuando su temperatura aumenta de 0 hasta 4 �C. Cuando un cuerpo absorbe calor, sus mol�culas adquieren mayor energ�a cin�tica y ocupa mayor espacio; en consecuencia, el cuerpo aumenta sus dimensiones, el espacio que se da entre las mol�culas es conocido como coeficiente de dilataci�n y para cada material es diferente.

De los estados de la materia el s�lido es el que se dilata menos en comparaci�n con los fluidos, de los cuales el gas se dilata notablemente.

La dilataci�n se considera, de manera general, de tres tipos: lineal, superficial y c�bica.

Dilataci�n lineal

Este tipo de dilataci�n se presenta en cuerpos cuya dimensi�n principal es su longitud y es indispensable considerarla en cables, v�as de ferrocarril o varillas; se calcula por medio de un instrumento llamado pir�metro de cuadrante.

Graphics

Cuando dos varillas de diferente material son calentadas de 25 �C a 68 �C se observa que las dos aumentan su tama�o, pero no en la misma proporci�n. El incremento de tama�o de cada varilla, cuando su temperatura se eleva un grado celsius, se conoce como coeficiente de dilataci�n y se define como el aumento que experimenta un cuerpo por cada grado cent�grado que su temperatura aumente.

La dilataci�n lineal que experimenta un cuerpo cuando se calienta depende b�sicamente de tres factores, que son:

a) longitud inicial Graphics

b) incremento de temperatura Graphics

c) coeficiente de dilataci�n Graphics

La relaci�n matem�tica de estos tres factores establece la igualdad:

Graphics

Ejemplo:

�En cu�nto aumentar� su longitud un alambre de cobre cuya longitud inicial es de 100 m, si la temperatura var�a de -15 �C a 32 �C? El coeficiente de dilataci�n del cobre es de Graphics

Explanation:

You might be interested in
Consider a 1260-kg automobile clocked by law-enforcement radar at a speed of 85.5 km/h. If the position of the car is known to w
-BARSIC- [3]
The expected speed is v = 85.5 km/h
 v = 85.5 km/h = (85.5 km/h)*(0.2778 (m/s)/(km/h)) = 23.75 m/s

If there is an uncertainty of 2 meters in measuring the position, then within a 1-second time interval:
The lower measurement for the speed is v₁ = 21.75 m/s,
The upper measurement for the speed is v₂ = 25.75 m/s.
The range of variation is
Δv = v₂ - v₁ = 4 m/s

The uncertainty in measuring the speed is
Δv/v = 4/23.75 = 0.1684 = 16.84%

Answer: 16.8%
3 0
3 years ago
Christy is a forensic scientist. She is given
Nitella [24]

Answer:

The white powder is not sugar, so Christy's hypothesis is incorrect . Christy's next step should be to identify substances that have the measured molecular mass.

Explanation:

6 0
3 years ago
Is it possible to transfer heat from a cold reservoir to a hot reservoir?
tankabanditka [31]

Answer is: B.) Yes, if work is done, this transfer process can take place.

For example,  air conditioner involves a cyclic process that transfers heat from a cold reservoir to a hot reservoir, but with use of electricity.

Thermal conductuction is the transfer of heat through physical contact. Thermal conduction is the transfer of heat by microscopic collisions of particles. Heat spontaneously flows from a hotter to a colder body.

The process of heat conduction depends on four basic factors: the temperature gradient, the cross section of the materials involved, their path length and the properties of those materials.

8 0
3 years ago
Read 2 more answers
-K-12 Scientific Method
hjlf

Answer:

The correct answer is - scientific law.

Explanation:

A scientific law is an explanation to a well observed phenomenon of the world which is found true every time tested and universal proven fact, but the reason behind the phenomenon and its existence.

To explain the scientific law there will be various explanation that are called scientific theory, however these theories can not be proved.

Thus, the correct answer is - scientific law.

8 0
3 years ago
Manganese(III) oxide is a transition metal compound. The oxidation state of manganese in this compound is _______ , and the chem
Kisachek [45]

Answer:

Hello my Friend! The answer is: Manganese(III) oxide is a transition metal compound. The oxidation state of manganese in this compound is +3 , and the chemical formula of the compound is Mn2O3.

Explanation:

Manganese can have two oxidation states: +2 and +3, but in this case, the "(III)"  indicates that in this compound, the state of oxidation is +3.

7 0
3 years ago
Read 2 more answers
Other questions:
  • What fraction of atoms in morphine is accounted for by carbon?
    5·2 answers
  • Which is the process by which plants convert light energy into chemical energy?
    7·2 answers
  • A) How much CO is required for the production of Fe from 1000 tonnes of magnetite (Fe2O4). Assume that the iron ore is 100% pure
    13·1 answer
  • What are some common tools scientists use to measure length and mass?
    14·1 answer
  • CaCl2 + Na2CO3 → CaCO3 + 2 NaCl
    7·2 answers
  • When CO2 decomposes into oxygen and carbon, it gives a gram ratio of 2.67:1 O2:C. When a 32.4g of CO2 decomposes, how many grams
    15·1 answer
  • Please help me with this question! I am a bit stuck.
    10·1 answer
  • Methane Gas (CH4) is an example of a(n) __________. *
    12·1 answer
  • If the molar mass of aluminum chloride was actually 400 g/mol, what would the molecular formula of aluminum chloride be?
    14·1 answer
  • A grade 8 students burnt white phosphorus in the air contained in a bell jar. what will be the volume of the renaming air in the
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!