Answer
$c\gt$$b\gt$$d$$\gt$$a$
Work Step by Step
Heat is defined as:
$Q=mc$$\Delta$$T$
Where $m$ is mass $c$ is specific heat capacity , $\Delta$$T$ is the temperature change.
Specific heat is same for all cases , so according to the table from the task we have :
$Q$$_a$ $=$ $2.0kg$ • $15°$$C$ •$c$ $=$ $30kg°C$•$c$
$Q$$_b$ $=$ $1.5kg$ • $40°C$•$c$ $=$ $60kg°C$•$c$
$Q$$_c$$=$ $3.0kg$ • $25°C$•$c$ $=75kg°C$ •$c$
$Q$$_d$ $=$$2.5kg$ • $20°$$C$•$c$ $=$$50kg°C$•$c$
Now, we have to rank it
$c$$\gt$$b$$\gt$$d$$\gt$$a$
