If heat is taken in by a process, the process is described as

If heat is taken in by a process, the process is described as

• A. Endothermic
• B. Exothermic
• C. Isothermal
• D. Adiabatic

Answer: (A)

Taking heat into the system means energy is being absorbed from the surroundings, so the process is endothermic. In endothermic processes, the heat flow is into the system, which often leads to a rise in the system’s internal energy (positive heat change). This contrasts with exothermic processes, where heat leaves the system to the surroundings. Isothermal means the temperature stays the same, which can happen while heat flows in or out but is not defined by heat entering; adiabatic means no heat is exchanged at all. An everyday example of endothermic behavior is melting ice, where heat is absorbed to break the solid lattice.

Taking heat into the system means energy is being absorbed from the surroundings, so the process is endothermic. In endothermic processes, the heat flow is into the system, which often leads to a rise in the system’s internal energy (positive heat change). This contrasts with exothermic processes, where heat leaves the system to the surroundings. Isothermal means the temperature stays the same, which can happen while heat flows in or out but is not defined by heat entering; adiabatic means no heat is exchanged at all. An everyday example of endothermic behavior is melting ice, where heat is absorbed to break the solid lattice.