Critical Thinking Items

What is 100.00 °C in kelvins?

1. 212.00 K
2. 100.00 K
3. 473.15 K
4. 373.15 K

The value of specific heat is the same whether the units are J/kg⋅K or J/kg⋅ºC. How?

1. Temperature difference is dependent on the chosen temperature scale.
2. Temperature change is different in units of kelvins and degrees Celsius.
3. Reading of temperatures in kelvins and degree Celsius are the same.
4. The temperature change is the same in units of kelvins and degrees Celsius.

What is the specific heat of a substance that requires 5.00 kJ of heat to raise the temperature of 3.00 kg by 5.00 °F?

1. 3.33×10³ J/kg ⋅° C
2. 6.00×10³ J/kg ⋅° C
3. 3.33×10² J/kg ⋅ ° C
4. 6.00×10² J/kg ⋅ ° C

Assume 1.0 kg of ice at 0 °C starts to melt. It absorbs 300 kJ of energy by heat. What is the temperature of the water afterwards?

1. 10 °C
2. 20 °C
3. 5 °C
4. 0 °C