1-2

Question 1

Open system?

Answer 1

Heat and matter (water vapour) exits

Question 2

Closed system?

Answer 2

Only energy exits

Question 3

Isolated system?

Answer 3

Energy nor matter exits

Question 4

Energy E?

Answer 4

Capacity to do work or produce heat

Question 5

Work W?

Answer 5

When a force acts through a distance

Question 6

Heat q?

Answer 6

Involves transfer of E due to a difference in temperature (energy wasted and not used for work)

Question 7

Internal energy of a system U?

Answer 7

Sum of kinetic and potential energies of all particles in the system.

Question 8

What can change the internal energy of a system? 3•

Answer 8

•work
•heat
•both

Question 9

Equation of Work in pressure-volume work systems?

Answer 9

W = P_ext*deltaV, P_ext = external pressure, deltaV = change in volume.

Question 10

If heat transfers in a system, then q <> 0?

Answer 10

q > 0

Question 11

If work transfer out of a system, then w <> 0?

Answer 11

w < 0

Question 12

Change of internal energy?

Answer 12

The difference between the final internal energy and the initial internal energy, which is also q + w.

Question 13

Adiabatic walls?

Answer 13

Prevent heat transfer between systems and surroundings.

Question 14

Diathermal walls?

Answer 14

Permit heat transfer

Question 15

If deltaU < 0, then internal energy?

Answer 15

Decreases from initial to final internal energy.

Question 16

Equation of work?

Answer 16

F(r_f - r_i)

Question 17

Distanced travelled can be given by the average?

Answer 17

Average speed

Question 18

Average speed formula?

Answer 18

((v_i + v_f)/2) + t, t = elapsed time