Heat Transfer and Thermodynamics

Latent heat of water is very high. That is, ice cream melts faster than ice. Technically, ice cream absorbs heat faster than ice. if you place your hand in ice cream it absorbs heat from your hand faster. This makes us feel ice cream is colder than ice.

The amount of heat required to change 1 kg substance from liquid to vapour state without change of temperature is called latent heat of vaporisation.

The heat capacity of a material does not depend on pressure, because density depends on pressure.

Yes, the 1^st Law of Thermodyamics states - Energy cannot be created or destroyed, it can only be changed from one form to another. 

SI units for specific heat capacity is joule per kilogram kelvin (J/kg.K)

Conduction is the transfer of energy through matter from particle to particle. It is the transfer and distribution of heat energy from atom to atom within a substance.

Heat Capacity : ratio of the amount of energy absorbed to the associated temperature rise.
10 calories/2^oC = 5 calories per ^oC.
This is the correct option.

Liquids have a characteristic temperature at which they turn into solids, known as their freezing point.

Specific heat capacity of water = 4200 J/(kg K).
Heat energy input = 84000 = 5 x 4200 x temperature rise.
Temperature rise = 84000/[5 x 4200] = 4 K.

Iron is a relatively good conductor of heat, although it does have some resistance to the flow of heat.

Convection is one form of energy transfer where heat energy is transferred by large scale movement in a gas or liquid.

Specific heat capacity of copper = 913 J/(kg K). 
Therefore Heat energy = mass x specific heat capacity x temperature change = 3 x 913 x 6 = 16434 J.

4182 J/kg^oC

SI unit of temperature is Kelvin. T (K) = T (^oC) + 273.
300 K = 300 – 273 = 27^oC.

The melting point of wax is 63^oC.