Question

What is the specific heat capacity of lead?

Answer 1

Hint: Specific heat capacity of a substance is the total amount of energy required to raise the temperature of unit mass (in gram) of substance by $1^oC$. In simple words, we can say that the substance which gets heated intensively will have a low specific heat capacity. Lead is a metal, so the specific heat will be less as compared to water and air.

Complete answer:
The response of various substances is quite different from heat. For example, a metal chair if placed under the hot sun will get quite heated. But an equal amount of water kept in the same sun might not get heated as much as the chair. So, we can say the resistance of a substance to heat is directly proportional to its specific heat.
The formula for finding specific heat is: $Specific\text{ heat capacity = }\dfrac{Energy\text{ required}}{mass\text{ }\times \text{ }\Delta T \text{ }}$
The SI unit for specific heat is Joules per gram per degree Celsius $g\,{^0}C$. The CGS unit is calories per gram per degree (cal/goC). It is denoted by cp as the pressure remains constant when the heat change occurs.
The specific heat capacity of lead is \[0.129j/g\,{^0}C\]

Additional information: The specific heat capacity is associated with internal energy. The heat resistance makes it a type of thermal inertia. Thus, Specific heat is an intensive property.

Note:
The change in heat capacity of a different substance is to different magnitudes depending on the amount of heat supplied. The temperature change occurs which eventually changes the value of the specific heat of the substance. The specific heat can also be found by knowing the quantity of heat (Q). It can be substituted in place of the energy required. The formula will then become:
$Specific\text{ heat capacity = }\dfrac{Q}{mass\text{ }\times \text{ }\Delta T \text{ }}$