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
iVinArrow [24]
3 years ago
12

An iron bar at 200c is placed in thermal contact with an identical iron bar at 120c in an isolated system

Chemistry
2 answers:
Andrei [34K]3 years ago
8 0

Answer:

A.  

The temperatures of the iron bars after 30 minutes would be less than 160°C because heat would be lost to the surroundings.

Explanation:

For edmentum and plato

Step2247 [10]3 years ago
7 0

Conduction: In the conduction, the heat is transferred from the hotter body to the colder body until the temperature on both bodies are equal.

In thermal equilibrium, there is no heat transfer as the heat is transferred till the temperature on the bodies are not same.

In the given problem, an iron bar at 200°C is placed in thermal contact with an identical iron bar at 120°C in an isolated system. After 30 minutes, the thermal equilibrium is attained. Then, the temperature on both iron bars are equal.Both iron bars are at 160°C in an isolated system.

But in an open system, the temperatures of the iron bars after 30 minutes would be less than 160°C. There will be heat lost to the surrounding. The room temperature is 25°C. There will be exchange of the heat occur between the iron bars and the surrounding. But It would take more than 30 minutes for both iron bars to reach 160°C because heat would be transferred less efficiently.

You might be interested in
Why gold is called inert metal​
astraxan [27]

Gold has a heavy enough nucleus that its electrons must travel at speeds nearing the speed of light to prevent them from falling into the nucleus. This relativistic effect applies to those orbitals that have appreciable density at the nucleus, such as s and p orbitals. These relativistic electrons gain mass and as a consequence, their orbits contract. As these s and (to some degree) p orbits are contracted, the other electrons in d and f orbitals are better screened from the nucleus and their orbitals actually expand.

Since the 6s orbital with one electron is contracted, this electron is more tightly bound to the nucleus and less available for bonding with other atoms. The 4f and 5d orbitals expand, but can't be involved in bond formation since they are completely filled. This is why gold is relatively unreactive.

Hope it helps

5 0
2 years ago
Which of the following is not an example of a chemical change?
elena55 [62]
This would be C. A car rusting
5 0
3 years ago
Read 2 more answers
Figure 4, Future climate prediction for North America. By 2100, the low-emissions scenario (550 ppm CO2, left) and high-emission
ella [17]

Answer:

Las Vegas is expected to recieve less precipitation

6 0
2 years ago
What are the parts of the water system? Label the water wheel to show the matter and forms energy that flow through the system.
Irina-Kira [14]

Answer:

Source, processing and distribution are the components of water system.

Explanation:

There are three parts of water system i. e. the source, the processing and distribution. Water is extracted from a source such as underground water, lake or river etc. After extraction this water is transported to the processing unit where it can be purified and after purification it is distributed to all places where it is needed. Potential energy is a form of energy that flows through this water system because the water is extracted from a depth and we know that depth and height refers to potential energy.

8 0
3 years ago
The octet rule pertains to:
Vinil7 [7]
I think the answer to c
4 0
3 years ago
Other questions:
  • All atoms of an element always have the same number of question 4 options: electrons protons electrons neutrons save
    8·1 answer
  • Can a tank of oxygen gas ever be half empty? Explain
    5·2 answers
  • What name is given to a polymer where all of the substituents (i.e., the R groups) are in the same relative orientation (i.e., o
    15·1 answer
  • Methane is a type of coal.<br> true or false
    7·1 answer
  • Complete the word equation for making a salt. _________ + __________ → salt
    7·2 answers
  • Unscramble the word. Lncsuoicno
    10·1 answer
  • New Pressure of gas when temp is 235 k
    9·1 answer
  • Got banned for a while sorry everyone ill answer your questions :(
    13·2 answers
  • A sonar device on a ship sends ultrasound waves under the water to locate a submarine. It takes
    10·1 answer
  • How do isotopes affect the average atomic mass of an element?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!