Question 315: Thermodynamics & KTG

Question

Two different metal bodies A and B of equal mass are heated at a uniform rate under similar conditions. The variation of temperature of the bodies is graphically represented as shown in the figure. The ratio of specific heat capacities is :

Accepted Answer

$${\left( {{{\Delta Q} \over {\Delta t}}} \right)_A} = {\left( {{{\Delta Q} \over {\Delta t}}} \right)_B}$$
$$m{S_A}{\left( {{{\Delta T} \over {\Delta t}}} \right)_A} = m{S_B}{\left( {{{\Delta T} \over {\Delta t}}} \right)_B}$$
$$ \Rightarrow $$ $${{{S_A}} \over {{S_B}}} = {{{{\left( {{{\Delta T} \over {\Delta t}}} \right)}_B}} \over {{{\left( {{{\Delta T} \over {\Delta t}}} \right)}_B}}} = {{90/6} \over {120/3}} = {{15} \over {40}} = {3 \over 8}$$

Answer

$${8 \over 3}$$

Answer

$${3 \over 8}$$

Answer

$${3 \over 4}$$

Answer

$${4 \over 3}$$

Thermodynamics & KTG

Two different metal bodies A and B of equal mass are heated at a uniform rate under similar conditions. The variation of temperature of the bodies is graphically represented as shown in the figure. The ratio of specific heat capacities is :

Choose the correct answer: