Question

2a. If a substance A has a higher heat capacity than another substance B and they are both exposed to the same amount of heat input, which substance will show the greatest change in temperature. Explain your answer

2b.

List the equations and define each term for…

A Heat when specific heat capacity is used.

B Heat when heat capacity is used.

Answer 1

Answer: 2(a) If a substance A has higher heat capacity than substances B and they both exposed to same heat input , than the substance B will show greatest change in temperature ,

Explained as : heat capacity (C) =

Heat supplied / change in temperature (∆T)

For same amount of heat input for both the substance , heat capacity is inversely proportional to the change in temperature .

Since A substance has higher heat capacity so ∆T for A is less or we can say ∆T for substance B will be greatest.

2(b) : A part

Relation of specific heat capacity with temperature

Q = m.s.∆T m= mass of substance (g)

Q= amount of heat supplied (J)

s = specific heat capacity (J/g °C )

∆T = change in temperature (°C)  

Specific heat capacity (s) is defined as the heat required to change the temperature of unit mass of a substance by 1°C .

Again for same amount of heat input and for fixed mass of both the substance , specific heat capacity is inversely proportional to the temperature , and for the same reason substance B will show greatest change in temperature.

2(b) B part

Heat capacity (C) = heat supplied / ∆T

∆ T = Change in temperature (°C)

Heat capacity is defined as the heat required to change the temperature of a substance by 1°C .

Again heat capacity is inversely proportional to temperature for fixed amount of heat input ,So, substance B will show greatest change in temperature.