Heat and Temperature

Study the given table and answer the following questions.SubstancesSp. heat capacityA380 J/Kg0CB470 J/Kg0CC140 J/Kg0Ca. What is meant by the statement the specific heat capacity of B is 470 J/Kg0C?...

It means one kilogram mass of B requires 470J of heat to raise its temp. by 1⁰C.

C will have the highest temperature because it has the lowest sp. heat capacity and B will have the lowest temperature because it has the highest sp. heat capacity.
From: sp. heat capacity 1/temperature.

B will make the deepest hole in the wax slab because it has more heat to release to the wax slab as it is with constant mass and temp. with the highest sp. heat capacity.

1. Which of the following is correct expression of the first law of thermodynamics?a) q= ∆ H - Wb) ∆ H=q+Wc) ∆ U= q+ Wd) ∆ U= ∆ H +P ∆ V 2.The first law of thermodynamics fails to decide________...

1. Which of the following is correct expression of the first law of thermodynamics?

a) q=H - W

b)H=q+W

What are the biological roles of water?

Water is a vital substance for life on Earth, and it plays numerous important biological roles in living organisms. Some of the key biological roles of water are:

Universal solvent: Water is an excellent solvent for many substances, both organic and inorganic. This means that it can dissolve and transport a wide range of nutrients and minerals necessary for the growth and survival of living organisms.
Medium for metabolic reactions: Many metabolic reactions in living organisms require water...

Write down any 4 effects of heat.

Any effects of heat are:

Heat changes the volume of a body.
Heat changes the physical states of the body.
Heat changes the solubility of the substance.
Heat brings about chemical change.
Heat changes the temperature of a body.

PVC isn't used to cover the handle of pressure cooker but bakelite is. Why?

We know, bakelite is insulator of heat and doesn't melts at high temperature also but PVC melts on simple heating also. So, PVC isn't used to cover the handle of pressure cookers but bakelite is.

explain the molecular concept of thermal energy

Thermal energy is the energy that is associated with the movement of molecules. At the molecular level, thermal energy is the energy that is associated with the vibrational, rotational, and translational motion of molecules.

All molecules are in constant motion due to the heat energy they possess. The faster the molecules are moving, the higher the temperature of the substance. The energy of these molecular movements increases with temperature. When a substance is heated, the energy of the...