Question

Calculate the amount of heat needed to raise the temperature of 4 ml of water from 10C to 30C
1 point
40 calories
80 calories
120 calories
1200 calories

Answer 1

Answer:

$Q=80cal$

Explanation:

Hello,

In this case, the relationship between heat, mass, specific heat and change in temperature is understood by:

$Q=mCp(T_2-T_1)$

In this case, since the involved substance is water, whose specific heat is 1 cal/(g°C), we compute the heat 4 mL of water need to rise the temperature from 10 °C to 30 °C as shown below:

$Q=4mL*\frac{1g}{1mL}*1\frac{cal}{g\°C}*(30\°C-10\°C)\\ \\Q=80cal$

Best regards.