Molecular Physics | Thermodynamics Answers

A standard electric kettle uses 2000 Watts of electrical power. Power is defined as the energy transfer per unit time interval. Assuming that all the energy from the kettle is transferred to the water, determine how long a kettle should be switched on to bring 750 ml of water from standard room temperature to the boiling point,when Standard room temperature is 21° C and the boiling point of water is 99° C.

Determine how much heat is required to bring 750 ml of water from standard room temperature to the boiling point when Standard room temperature is 21° C and the boiling point of water is 99° C.

Standard room temperature is 21° C and the boiling point of water in Pretoria is 99° C. Explain why the boiling point it is not exactly 100° C?

The mass density, ρ, is defined by:

Write down the value for the specific heat capacity of water, c, as well as the mass density of water, ρ.

How to write down the equation for determining the heat, Q, transferred to a substance, in terms of the change in temperature, ΔT, the specific heat capacity, c, and the mass of the substance, m.

What is the specific latent heat of a
0.75kg object that transfers 251kJ during a change of state?

During the power stroke of an engine, the work produced is 2520 kj/kg and the heat rejected through the cylinder is 570 kj/kg. If the internal energy increased by 120 kj/kg, determine the amount of heat received in kj/s if the working fluid flow at the rate of 3 kg/s.