Specific heat(cp) of the substance

The heat capacity of a substance per unit mass is called the specific heat(cp) of the substance.

Heat Capacity (Cp) of the substance.

The ratio of the heat (Q) added to or removed from a substance to the change in temperature (∆T) produced is called the heat capacity (Cp) of the substance.

Latent heat of vaporization

Latent heat of vaporization is the amount of heat added or removed to change phase between liquid and vapor.

Latent heat of fusion

Latent heat of fusion is the amount of heat added or removed to change phase between solid and liquid.

Latent heat

Latent heat is the amount of heat added to or removed from a substance to produce a change in phase.

Sensible heat

The heat added to or removed from a substance to produce a change in its temperature is called sensible heat.

Work

Work is defined for mechanical systems as the action of a force on an object through a distance.

A positive value for work indicates that work is done by the system on its surroundings; a negative value indicates that work is done on the system by its surroundings.

Specific enthalpy

Specific enthalpy (h) is defined as h=u+Pν, where u is the specific internal energy (Btu/lbm) of the system being studied, P is the pressure of the system (lbf/ft2 ), and ν is the specific volume (ft3 /lbm) of the system.

Potential energy; Kinetic energy; Specific internal energy

Potential energy (PE) is defined as the energy of position.

Kinetic energy (KE) is the energy of motion.

The specific internal energy (u) of a substance is its internal energy per unit mass.

Energy

Energy is defined as the capacity of a system to perform work or produce heat.

Absolute Pressure & Gauge Pressure

When pressure is measured relative to a perfect vacuum, it is called absolute pressure (psia).

When pressure is measured relative to atmospheric pressure (14.7 psi), it is called gauge pressure (psig).

Pressure

Pressure is a measure of the force exerted per unit area on the boundaries of a substance (or system). It is caused by the collisions of the molecules of the substance with the boundaries of the system.

Rankine (R) scale

The absolute scale that corresponds to the Fahrenheit scale is called the Rankine (R) scale.

Kelvin (K) scale

The absolute temperature scale that corresponds to the Celsius scale is called the Kelvin (K) scale.

EARTH HOUR

EARTH HOUR is a global event organized by WWF (World Wide Fund for Nature, also known as World Wildlife Fund) and is held on the last Saturday of March annually, asking households and businesses to turn off their non-essential lights and other electrical appliances for one hour to raise awareness towards the need to take action on climate change.

Cryptex

A Cryptex is a kind of lock with a password, that holds a roll of paper.