Understanding the First Law of Thermodynamics

🔥The First Law of Thermodynamics states that the change in internal energy of a system is equal to the heat input minus the work done by the system.

💨When a gas expands, it does work against the external environment and loses energy.

🌡️Specific heat is the amount of heat required to produce a temperature change in a substance.

📖Specific heat can be defined at constant volume (C_V) or constant pressure (C_P).

🔍The specific heat at constant pressure is greater than the specific heat at constant volume due to the work done by the gas during expansion.

What is the First Law of Thermodynamics?

—The First Law of Thermodynamics states that the change in internal energy of a system is equal to the heat input minus the work done by the system.

What happens when a gas expands?

—When a gas expands, it does work against the external environment and loses energy.

What is specific heat?

—Specific heat is the amount of heat required to produce a temperature change in a substance.

What is the difference between C_V and C_P?

—C_V is the specific heat at constant volume, while C_P is the specific heat at constant pressure.

Why is the specific heat at constant pressure greater than at constant volume?

—The specific heat at constant pressure is greater than at constant volume due to the work done by the gas during expansion.

00:01Understanding the First Law of Thermodynamics

01:19The First Law of Thermodynamics states that the change in internal energy of a system is equal to the heat input minus the work done by the system.

02:51When a gas expands, it does work against the external environment and loses energy.

10:13Specific heat is the amount of heat required to produce a temperature change in a substance.

13:01Specific heat can be defined at constant volume (C_V) or constant pressure (C_P).

15:24The specific heat at constant pressure is greater than at constant volume due to the work done by the gas during expansion.