Molecular Physics | Thermodynamics Answers

A nickel-steel rod at 21oC is 0.62406m in length. Raising the temperature to 31oC produces an elongation of 121.6µm. Find the length at 0oC and the coefficient of linear expansion.

In each cycle of a Carnot engine, 242 J of heat is absorbed from the high-temperature reservoir and 121 J is exhausted to the low-temperature reservoir. What is the efficiency of the engine?

In each cycle of a Carnot engine, 116 J of
heat is absorbed from the high-temperature
reservoir and 51 J is exhausted to the low temperature reservoir.
What is the efficiency of the engine?

750 J is conducted from a reservoir at 400 K
to one at 270 K.
What is the change in entropy of the uni-
versity?
Answer in units of J/K

A refrigerator operates with Carnot efficiency
between temperatures −4.8C and 36.1C.
What is its coefficient of performance?

One mole of the ideal gas is initially at 4 atm
and 2 L. As the gas is slowly heated, the
plot of its state on a PV diagram moves in a
straight line to the state 5 atm and 7 L.
Find the work done by the gas.
Answer in units of kJ

In each cycle of a Carnot engine, 93 J of heat is
absorbed from the high-temperature reservoir
and 58 J is exhausted to the low-temperature
reservoir. What is the efficiency of the engine?

How many kJ are needed to convert 14.4 grams of ice at -80.0 degrees Celsius to water at 61 degrees Celsius?

If 6.50 kJ are used to heat 63.0 grams of water at 20 degrees Celsius, what will be its final temperature?

At what temp. dv/dT=0for water