Question

10. A liquid is irregularly stirred in a wel-insulated container and thereby undergoes a rise in temperature. Regarding the liquid as the system, you can say that A heat has been transferred. 8 the rise in temperature indicates work done by the system. C the internal energy has been unchanged. D the work done by the system equals the work done on the system. E there is a positive change in internal energy. An 11. An ideal gas is heated so that it expands at constant pressure. The gas does work W. What heat is added to the gas? A) exactly W B) exactly-W C) zero D) more than W E) less than -W An D 12. Volume → An ideal gas system changes from state i to state t by paths iaf and ibf. If the heat added along iaf is Qjaf = 50 cal, the work along laf is Wiaf = 20 cal. Along ibf, if Qibf 40 cal Pressure

Answer 1

6 when liquid is stirred then stirrer done a work on the liquid. so Kinetic. energy of liquid molecules increases. As a resulto temperature of liquid Lises. (A). Since here no source of heat is foresent ÇStiner may be assumed åt same temperature Las liquid), so there is no transfer of heat So this statement is false ® Here cook is done on the systewi met "by the system. so this statement is also false © when temperature of a substance changes then its internal Energy must changes.' so this statement is also false. Here System does niet do any wosk-done. So this statement is also false. 8 since there is a rise in temperature so Change in internal energy is Positive uso this statement is true" ① let är is the change in volume then work done, W=PXAV = Positive quantity (: gas expands so ou is tue, hence wis also tve) By fast low of thermodynamics Q = AUFW {su - Change in una internal energy} from above equation it is clear that ... Q>W so option Ő is colorect....

Question 12 is incomplete...