Generate Quiz 698B2F0E1BCB9

Lowering the temperature reduces the velocity of the gas molecules, while increasing the pressure reduces the gas’s volume.

The temperature, pressure, and amount of substance present in a system are referred to as its thermodynamic state. State functions include things like density, enthalpy, entropy, and internal energy. Work is not a state function and is therefore the right choice because state functions only rely on these parameters and not on how they were arrived at.

The total of the system’s kinetic and potential energy is known as internal energy. In a thermodynamic system, it is the total of all potential molecular energies.

To determine the heater’s power if the water’s specific heat capacity is 4.2 J/g/C is.

The energy required to heat 500g of water from 20°C to 50°C should be determined first.

Q = msΔT, the energy required to raise the water’s temperature

= 4.2J/g/°C × (50°C – 20°C) × 500g

500 × 4.2 × 30 J

= 63000 J

Now, the heater’s power is equal to its energy dissipated times the time required.

= 63000 J/5 min = 63000/300 = 210 W

Consequently, the heater has 210 Watts of power.

Since this is a numerical question, there is only one right answer.

The lowest temperature that can be attained in theory is absolute zero. It is equivalent to -559.67 degrees Fahrenheit (°F), -273.15 degrees Celsius (°C), and 0 Kelvin (K). Although the zero points of all three scales are set at various temperatures, they all converge at absolute zero. It is theoretically impossible to extract heat energy from a system at this temperature, and all molecular motion stops.

The quantity of heat energy needed to raise a given quantity of matter’s temperature by one degree Celsius is known as its heat capacity. Heat capacity is a broad property because it depends on the size or quantity of a given substance. Heat capacity is measured in joules per degree Celsius or joules per Kelvin.