Question

Using the table below, provide a reason as to why the energy needed to heat the

Sample A is significantly less than Sample B.
Mass of
Water
Change
in Temp.
Energy
Needed
Sample A 50 grams
15 °C
3138
joules
Sample B 50 grams
15 °C
19788
joules

Answer 1

Step-by-step explanation:

Both Sample A and B have the same mass (5g) and same temperature change (15°C). What is not said and may explain the difference in energy needed are their initial states and temperature.

For example Sample B may be liquid water at 90°C. Heating it up to 105°C will require additional energy to go from liquid to gas state. If Sample A is water vapor at 105°C at first, it has a lower specific heat and heating it up to 120°C does not involve a state change. So the eneregy needed is less.