Um bloco de prata de massa m= 40g é aquecido de 30°C até 80° C a) qual a quantidade de calor que foi cedida ao bloco?
b) Se fornecermos este bloco a 250 cal de calor, de quanto ele se elevará sua temperatura?

a) Q = 111.6 cal

b) T2 = 415.15K = 142°C

Explanation:

a) To calculate the amount oh heat given to the block of silver, you use the following formula:

     (1)

m: mass of the block = 40g

T2: final temperature = 80°C = 353.15k

T1: initial temperature = 30°C = 303.25K

c: specific heat of silver = 0.0558cal/g.K

You replace the values of the parameters in the equation (1):

hence, the amount of heat is 111.6 cal

b) The temperature is calculated by solving the equation (1) for T2:

hence, the final temperature when 250 cal of heat is geiven to the block of silver, is 415.15K