Entropy change when heat flows
Grade 11 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
A container of gas absorbs 1500 J of heat slowly at a steady 227 °C. What is its entropy change, to 0.01 J/K, Bo? Add 273 to change °C to K.
A container of gas absorbs 1000 J of heat slowly at a steady 127 °C. What is its entropy change, to 0.01 J/K, Kira? Add 273 to change °C to K.
A cup of water gains 300 J of heat at 300 K. What is the sign of its entropy change, Jun?
- Zero, since its temperature held
- Negative: −1 J/K
- Positive: +1 J/K
A hot block loses 800 J of heat at 400 K. What is its entropy change, Luz?
- −2 J/K
- −0.5 J/K
- +2 J/K
Which object's entropy rises, Milo?
- A hot pan losing heat to the counter
- An ice cube taking in heat from the air
- A stove burner giving off heat to a pan
What does entropy track, by Noah's reading (OpenStax)?
- How disordered a system is
- How hot a system is, in °C
- How much mass a system has
In ΔS = Q ÷ T, which temperature scale must T use, by Pia's reading (OpenStax)?
- Degrees Fahrenheit
- Kelvins
- Degrees Celsius
In the bar chart, what is the hot reservoir's entropy change, Tala?
- +1 J/K
- −2 J/K
- −1 J/K
In the bar chart, what is the cold reservoir's entropy change, Zee?
Use the picture in question 8.
- +1 J/K
- +2 J/K
- −2 J/K
In the bar chart, which reservoir has the bigger entropy change in size, Esme?
Use the picture in question 8.
- Neither; the same heat gives the same change
- The cold reservoir, since its T is lower
- The hot reservoir, since its T is higher