Heat in a substance is an example of ________ energy. A. phase B. kinetic C. potential D. evaporative
2 answers:
Answer: Option (B) is the correct answer.
Explanation:
When there will be flow of energy from one substance to another then it is defined as the heat.
Since, heat is responsible for the movement of particles of a substance. This means that more if the heat more will be the kinetic energy as kinetic energy is the energy obtained by particles of a substance due to their motion.
Also, kinetic energy is directly proportional to temperature.
K.E =
So, more is the temperature of an object more will be heat transferred by it. Therefore, more will be its kinetic energy.
Thus, we can conclude that heat in a substance is an example of kinetic energy.
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Answer: 502 Joules
Explanation:
To calculate the mass of water, we use the equation:
Density of water = 1 g/mL
Volume of water = 40.0 mL
Putting values in above equation, we get:
When metal is dipped in water, the amount of heat released by lead will be equal to the amount of heat absorbed by water.
The equation used to calculate heat released or absorbed follows:
q = heat absorbed by water
= mass of water = 40.0 g
= final temperature of water = 20.0°C
= initial temperature of water = 17.0°C
= specific heat of water= 4.186 J/g°C
Putting values in equation 1, we get:
Hence, the joules of heat were re-leased by the lead is 502