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

`Q=80cal`

Step-by-step 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*(1g)/(1mL)*1(cal)/(g\°C)*(30\°C-10\°C)\\ \\Q=80cal`

Best regards.