Engineering Thermodynamics
According to Regnault's law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) _________ with the change in pressure and temperature of the gas.

Both (A) and (B)
Change
Do not change
None of these

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Engineering Thermodynamics
Coke is produced

When coal is first dried and then crushed to a fine powder by pulverizing machine
From the finely ground coal by moulding under pressure with or without a binding material
By heating wood with a limited supply of air to a temperature not less than 280°C
When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel

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