In the world’s coldest freezer, sodium gas was cooled to a temperature of 78.5°C below zero and then cooled 194.65°C more. What was the new temperature of the sodium gas?
Answer
A
–273.15°C
B
–272.7°C
C
–202.5°C
D
–116.15°C
Explanation
The sodium gas starts at −78.5°C and is cooled by another 194.65°C, so subtract: −78.5 − 194.65 = −273.15°C. The new temperature is −273.15°C, choice A.
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