Table of Contents

- 1 Is temperature constant in isothermal expansion?
- 2 What is isothermal expansion ratio in Carnot cycle?
- 3 What is constant temperature and pressure?
- 4 What is constant temperature process explain with diagram?
- 5 In which process the temperature of system decreases?
- 6 What happens in the isothermal expansion process?
- 7 What is a Carnot heat engine?
- 8 What is the Carnot cycle?
- 9 What is the Carnot theorem?

## Is temperature constant in isothermal expansion?

Isothermal Expansion Temperature is held constant, therefore the change in energy is zero (U=0). So, the heat absorbed by the gas equals the work done by the ideal gas on its surroundings. Enthalpy change is also equal to zero because the change in energy zero and the pressure and volume is constant.

## What is isothermal expansion ratio in Carnot cycle?

Carnot cycle works with isentropic compression ratio of 5 bar and isothermal ratio of 2. The volume of air at beginning of the isothermal expansion is 0.

**Does temperature decrease in isothermal expansion?**

Option (C) is isothermal expansion, since this is an isothermal process so there will be no change in temperature.

### What is constant temperature and pressure?

The pressure of a gas is inversely proportional to its volume when temperature is constant. The product of pressure and volume is constant when temperature is constant. This relationship is known as Boyle’s law or Mariotte’s law . A constant temperature process is said to be isothermal .

### What is constant temperature process explain with diagram?

A constant temperature process is an isothermal path in the P-V diagram—a hyperbolic isotherm. Example: a gas in a container that is immersed in a constant-temperature bath is allowed to expand slowly, or is compressed slowly. At constant temperature, the pressure of an ideal gas is: P = NkT/V.

**What is adiabatic expansion in Carnot cycle?**

The Carnot cycle consists of the following four processes: A reversible isothermal gas expansion process. In this process, the ideal gas in the system absorbs qin amount heat from a heat source at a high temperature Thigh, expands and does work on surroundings. A reversible adiabatic gas expansion process.

## In which process the temperature of system decreases?

adiabatic expansion

In adiabatic expansion of a gas system, gas expands, so temperature of the system decreases.

## What happens in the isothermal expansion process?

One condition, known as an isothermal expansion, involves keeping the gas at a constant temperature. In this case the gas cools as it expands, because, by the first law, the work done against the restraining force on the piston can only come from the internal energy of the gas.

**Which physical quantity is constant in the isothermal process expansion?**

The isothermal process is a process that takes place at the constant temperature (T = Constant, dT = 0).

### What is a Carnot heat engine?

Carnot heat engine is a theoretical engine that operates on a reversible carnot cycle. It has maximum efficiency that a heat engine can possess. Q3. Name the processes involved in Carnot cycle? It involves four process: isothermal expansion, adiabatic expansion, isothermal compression and adiabatic compression.

### What is the Carnot cycle?

Carnot Cycle: A Carnot cycle is defined as an ideal reversible closed thermodynamic cycle in which there are four successive operations involved, which are isothermal expansion, adiabatic expansion, isothermal compression and adiabatic compression. During these operations, the expansion and compression of substance can be done up to

**What is the efficiency of a Carnot engine at 7°C?**

A Carnot engine whose low temperature reservoir is at 7°C has an efficiency of 50\%. It is desired to increase the efficiency to 70\%. By how many degrees should the temperature of the high temperature reservoir be increased? – Quora A Carnot engine whose low temperature reservoir is at 7°C has an efficiency of 50\%.

## What is the Carnot theorem?

Carnot Theorem: According to Carnot Theorem: Any system working between two given temperatures T 1 (hot reservoir) and T 2 (cold reservoir), can never have an efficiency more than the Carnot engine working between the same reservoirs, respectively.