Helium Gas in an Ideal Otto Cycle Is Compressed from 12<°C

Multiple Choice

Helium gas in an ideal Otto cycle is compressed from 12<°C and 2 L to 0.25 L, and its temperature increases by an additional 800°C during the heat addition process. The temperature of helium before the expansion process is

A) 1668°C
B) 1182°C
C) 1941°C
D) 812°C
E) 575°C