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sweet [91]
3 years ago
9

A copper block ( 90°C) is placed in contact with a lead block ( 20°C), which is already in contact with an iron block (70°C). Wh

ich of the following will happen?
A. Heat will flow from the copper to the lead and from the iron to the lead until the temperatures are equal .

B. Heat will flow from the iron to the lead to the copper until the temperatures are equal.

C. Heat will flow from the copper to the lead to the iron until the temperatures are equal.

D. Heat will flow from the lead to the copper and to the iron until the temperatures are equal.
Chemistry
2 answers:
Ostrovityanka [42]3 years ago
3 0
<span>B. Heat will flow from the iron to the lead to the copper until the temperatures are equal. because i don't really speak Italian </span><span>
</span>
Radda [10]3 years ago
3 0

Answer: Option (A) is the correct answer.

Explanation:

According to zeroth law of thermodynamics, when two systems are in thermal equilibrium with the third system then all of them are in thermal equilibrium with each other.

Hence, when copper block is placed adjacent to lead block and lead block is placed adjacent to iron block then heat will flow from hotter block to the colder block.

Thus, we can conclude that heat will flow from the copper to the lead and from the iron to the lead until the temperatures are equal.

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Please help . also need the name of their binary ionic compound . ​
madreJ [45]

Answer:

See below!

Explanation:

For the chemical formula, you need to have enough of each atom so that the charge is zero.

Aluminum has a +3 charge, and fluorine has a -1 charge.  Since the charge has to be zero, you need three fluorines, giving you AlF₃.

Barium has a +2 charge, and oxygen has a -2 charge.  Since the charges are equal in magnitude but opposite in sign, you only need one of each atom giving you BaO.

The name of the ionic compound will be the metal and then the nonmetal.  When putting the nonmetal in, change the ending to "-ide".  For example "chlorine" would be "chloride.

CaCl₂  ==>  calcium chloride

Ga₂S₃  ==>  gallium sulfide

K₃N  ==>  potassium nitride

AlF₃ ==>  aluminum fluoride

BaO  ==>  barium oxide

6 0
3 years ago
How many moles of methanol are required to produce 4.19 moles of water
Harrizon [31]

Explanation:

every two moles of methanol will need three moles of oxygen gas and products 2 miles of carbon dioxide and 4 miles of water

6 0
3 years ago
For a different reaction, the plot of the reciprocal of concentration versus time in seconds was linear with a slope of 0.056 M-
Bond [772]

Answer:

C_t=0.165M

Explanation:

From the question we are told that:

Slope K=0.056 M-1 s -1

initial Concentration C_1=2.2M

Time t=100

Generally the equation for Raw law is mathematically given by

\frac{1}{C}_t=kt+\frac{1}{C}_0

\frac{1}{C}_t=0.056*100+\frac{1}{2.2}_0

C_t=0.165M

4 0
3 years ago
What physical change happens to atoms and molecules in a solution that is strongly heated in a flame? Is there a phase change? I
Charra [1.4K]

When atoms and molecules speed up or slow down, that is a physical change. When they change state from liquid to solid or from gas to liquid, that is a physical change. ... The ions or molecules can still come back together to form the original substance

6 0
2 years ago
Hewo fellow earthlings
kobusy [5.1K]

Answer:

Hello!

Explanation:

5 0
2 years ago
Read 2 more answers
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