Question

An increase in enthalpy leads to an increase in __________
a.Increase in pressure
b.Increase in volume
c.Increase in internal energy
d.Increase in mass

Answer 1

An increase in enthalpy leads to an increase in Internal Energy.

• As the temperature rises, the number of cell interactions increases. Using the equation from the first law of thermodynamics, the internal force also increases with increasing temperature. Therefore, an increase in enthalpy leads to an increase in internal energy.
• According to the law of energy conservation, the internal energy conversion is proportional to the heat transferred, the less work performed, the system. When only the function is performed by the volume conversion with constant pressure, the enthalpy conversion is exactly the same as the heat transferred to the system.
• When energy needs to be added to essentials to change its phase from liquid to electricity, that amount of energy is called the enthalpy (or subtle heat) of evaporation and is expressed in units of joules per molecule.

Answer 2

An increase in enthalpy leads to an increase in internal energy (Option - C)

• According to the First Law of Thermodynamics, Energy can neither be created nor be destroyed hence the increase in energy leads to increase in temperature and further increase in internal energy.
• ΔU = ΔW + ΔH
• Hence, the internal energy is constant, therefore an increase in work done by the system will lead to a decrease or release of energy.
• Therefore, work done and enthalpy change balance the internal energy of the system.