One mole of hydrogen with an initial temperature of 27℃ expands
and in the process, absorbs 4000 J of heat and does 3000 J of work,
the
final temperature of the gas is ()
A: 62.3℃
B: 105.6℃
C: 75.1℃
D: 56.3℃
and in the process, absorbs 4000 J of heat and does 3000 J of work,
the
final temperature of the gas is ()
A: 62.3℃
B: 105.6℃
C: 75.1℃
D: 56.3℃
举一反三
- A gas system absorbs 200J of heat and simultaneously does 300J work on surroundings at a given temperature, what is △U in joules for the gas system? A: +100 B: -200 C: +200 D: -100
- A Carnot refrigerator is operated between two reservoirs and the cold<br/>reservoirs is at temperature of 270K. If in each cycle the<br/>refrigerator receives 415 J of heat energy from the reservoir at 270K<br/>and 77 J work is needed to be done on the working substance. The<br/>quantity of the heat energy delivered to the hot reservoir is (). A: 90J B: 338 J C: 492J D: 578J
- A gas, while expanding absorbs 25 J of heat and does 243 J of work. What is DU for the gas? A: 268J B: -218J C: 218J D: -268J
- A<br/>gas enclosed in a cylinder by means of a piston that can move without<br/>friction is warmed, and 1000 J of heat enters the gas. Assuming that<br/>the volume of the gas is constant, the change in the internal energy<br/>of the gas is [] A: 0 B: 1000<br/>J C: -1000<br/>J D: None<br/>of the above
- A diesel engine performs<br/>35000 J of mechanical work and discards 45000 J of heat each cycle.<br/>The heat supplied to the engine in each cycle is () A: 10000J B: 45000J C: 25000J D: 80000J