Chemical is the answer your looking for.
Answer:
B. Step 1 is endothermic, Step 2 is endothermic, Step 3 is exothermic
Explanation:
Prior to the formation of a solution, the solvent molecules attract each other as well as the solute molecules. For a dissolution to be effective, those interactions need to be weakened, at the same time that interaction between solute and solvent ought to be established. The formation of solute-solvent interactions is exothermic and provides the energy required to separate solvent-solvent particles and solute-solute particles, being both processes endothermic (the absorbed energy is used to break the interactions).
Answer:
The work done is 2,907 J
Explanation:
Work is one of the forms of energy transmission between bodies. To perform a job, you must exert a force on a body and it moves. In other words, when a force is applied to a body and it moves, work is done.
The work is equal to the product of the force by the distance and by the cosine of the angle that exists between the direction of the force and the direction that the moving point or object travels:
W = F * d * cos α
In the International System of Units the Force is expressed in newtons and the distance in meters, so the work will have units of newtons. Meter = joules (J).
In this case:
Replacing:
W= 255 N* 11.4 m* cos 0
Solving:
W= 255 N* 11.4 m* 1
W= 2,907 J
<u><em>The work done is 2,907 J</em></u>
Answer:Temperature
Increase
Faster & Further Apart
Explanation:
It’s right on edge and you can assume this is correct because earlier lessons about hot air balloons talked about this.
Answer: c = 710 J/kg°C or 0.71 J/g°C
Explanation: Heat is expressed in the formula Q = mc∆T. Derive to find the specific heat c. So the formula will become c = Q / m∆T
c = Q / m∆T
= 42600 J / 2 kg ( 55°C - 25°C )
= 710 J /kg°C
Or can be expressed by converting kg to g.
c = 0.71 J /g°C