A system undergoes an adiabatic process in which its interna

A system undergoes an adiabatic process in which its internal energy increases by 20 J. Which of the following statements is true? 20 J of work was done on the system 20 J of work was done by the system the system received 20 J of energy as heat the system lost 20 J of energy as heat none of the above are true The diagram shows four slabs of different materials with equal thickness, placed side by side. Heat flows from left to right and the steady-state temperatures of the interlaces are given. Rank the materials according to their thermal conductivities, smallest to largest. 1.2, 3. 4 2, 1.3,4 3.4. 1.2 3,4, 2. 1 4. 3. 2. 1 The pressures p and volumes five ideal gases with the same number of molecules, are given below. Which has the highest temperature?

Solution

9. Since it is a adiabtic process energy is transferred only as work. So increase in internal energy implies there is work done on system. So a) is answer

10.since conductivity is directly proportional to change in temperature so answer would be D)

11.temparature is directly proportion to PV so PV is highest in B. so B is answer.

12.answer for 12 is d) as it is straight formula.