2.
Which chemical equation represents a decomposition reaction?
A. Ba +S → BaS
B. 6HgO + 6Hg + 30,
C. 2FeO + C + 2Fe + CO2
D. Sil + 2Mg →Si + 2MgI,

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)