1. What are the three phases of matter? How does temperature relate to kinetic e

Question

1. What are the three phases of matter? How does temperature relate to kinetic energy? Which phase of water has more kinetic energy?

2. Calculate the difference in temperature between the freezing point of water and the normal boiling point of water on the Celsius scale and on the Kelvin scale.

3. Calculate the quantity of heat required to raise the temperature of 2.00 g of water 4.00C.

4. Define Latent Heat

5. State the Laws of Thermodynamics. A system is provided 50 J of heat and work done on the system is 10 J. What is the change in internal energy?

Explanation / Answer

three phases of matter are-

solid state-  Molecules are held close to each other by their attractions of charge. They will bend and/or vibrate, but will stay in close proximity. The molecules have an ordered arrangement.

liquid state -Molecules will flow or glide over one another, but stay toward the bottom of the container. Motion is a bit more random than that of a solid. They have enough kinetic energy to slip out of the ordered arrangement of a solid.

gas state -Molecules are in continual straight-line motion. The kinetic energy of the molecule is greater than the attractive force between them, thus they are much farther apart and move freely of each other.

Temperature is the term used to explain how hot or cold an object is. Temperature is the average kinetic energy of particles in the substance. Water molecules at 0º C. lave lower kinetic energy than water at 100º C.

ans 2

differnence of temprature is equal either in K or º C. we know water freeze at 0º C. and boil at 100º C. so difference is 100º

ans 3

heat = mc*raise in temp where c is specific heat of water

= 2*4.18*4 = 33.44 J

ans 4

the heat required to convert a solid into a liquid or vapour, or a liquid into a vapour, without change of temperature.

"the latent heat of fusion"

ans 5

A way of expressing the first law of thermodynamics is that any change in the internal energy (E) of a system is given by the sum of the heat (q) that flows across its boundaries and the work (w) done on the system by the surroundings:

E=q+w

put the value

E =50J +10J = 60 J

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