Engineering Thermodynamics
If a system after undergoing a series of processes, returns to the initial state then

Its entropy will change due to irreversibility
Process is thermodynamically in equilibrium
Process is executed in closed system cycle
Sum of heat and work transfer will be zero

ANSWER DOWNLOAD EXAMIANS APP

Engineering Thermodynamics
Coke is produced

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
From the finely ground coal by moulding under pressure with or without a binding material
When coal is first dried and then crushed to a fine powder by pulverizing machine

ANSWER DOWNLOAD EXAMIANS APP