Question

thermodynamics graphing practice
graph 1:
the effect of time on temperature

1. what units are on the x axis?

what units are on the y axis?

1. describe the overall trend this graph depicts.
2. what is the iv in this experiment? dv?
3. describe how energy is changing in this graph.

Explanation:

1. Units on axes:

• The \(x\)-axis represents time, and the units are minutes.
• The \(y\)-axis represents temperature, and the units are degrees Celsius.

1. Overall trend:

• As time (in minutes) increases, the temperature (in degrees Celsius) decreases.

1. Independent and dependent variables:

• The independent variable (IV) is time (because it is the variable that is being manipulated or changed).
• The dependent variable (DV) is temperature (because it depends on the time and is the variable being measured).

1. Energy change:

• The graph shows a decrease in temperature over time. Since temperature is related to the average kinetic energy of particles, a decrease in temperature implies a decrease in the average kinetic energy of the particles in the system. This could mean that the system is losing energy (for example, through heat transfer to the surroundings).

Answer:

1. \(x\)-axis units: minutes; \(y\)-axis units: degrees Celsius.
2. As time increases, temperature decreases.
3. IV: time; DV: temperature.
4. The system is losing energy (as indicated by the decrease in temperature, which is related to a decrease in the average kinetic energy of particles).