Heat and thermodynamics

Temperature increases more in the container with the smaller amount of water.

• TRUE

• FALSE

In heat transfer, heat always flows from the _______________ substance to the _______________ substance.

• Hotter to colder

• Colder to hotter

• Hotter to hotter

• Colder to colder

Temperature is a measure of the average translational kinetic energy of molecules in a substance.

• TRUE

• FALSE

Change in Internal Energy (U) is equals to the difference of Heat (Q) and Work (W)

• TRUE

• FALSE

A heat engine performs 6 500 J of mechanical work while discarding 3 250 J to the heat sink. How much heat (QH) does it absorb from the hot reservoir?

• -3250 J

• 3250 J

• -9750 J

• 9750 J

A heat engine takes in 1 359 J of energy, losing 463 J of it to the cold reservoir. How efficient is the engine?

• 34.07 %

• 59.64 %

• 65.93 %

• 83.49 %

3rd law of thermodynamics is about "all matters contains at least some thermal energy".

• TRUE

• FALSE

The system absorbs 150 J of heat and does 100 J of work. The change in Internal Energy is ____?

• 50J

• -50J

• 150J

• -150J