Pure butane (CH10) is used as fuel and enters the burner at 30°C and a pressure of 100 kPa. It is burned with 50% excess dry air at 32°C and atmospheric pressure of 101.3 kPa. The flue gas leaves at 400°C and 101 kPa. Assuming complete combustion, (a) how many cubic meters of the product gas is produced per cubic meter of entering gas? (b) what is the dew point of the product gas?

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