If a room is at 75?C, and heat is added to double its internal energy (assume this doubles the temperature), what is the final temperature of the room in kelvins?
A. 41 000 K
B. 348.15 K
C. Temperatures on non-absolute scales cannot be related to temperatures on absolute scales without knowing the reference state(s).
D. 423.15 K
E. None of the above
A. Incorrect. You have followed the correction solution path, but note that conversions between temperatures in degrees Celsius and kelvins requireadding a value, not multiplying. This is unique to temperature unit conversions.
B. Incorrect. This is 75°C converted to kelvins, not the final temperature.
C. Incorrect. It is true that thermodynamic quantities like internal energy (U) are measured relative to a reference state, and that you can’t add or subtract values of U that are measured using different reference states. But there is nothing unknown about the reference states for these temperature scales; they all have defined relationships to each other.
D. Correct. In these conditions, the increase in internal energy must cause a rise in temperature. Doubling the internal energy in this room doubles the temperature. 150°C can be converted to kelvins by adding 273.15.
E. Incorrect. Check again.
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