Each class in Chongqing No.1 Middle School is equipped with a water dispenser, and the working principle circuit diagram of its heating part is shown in the figure, where S is a temperature control sw

Each class in Chongqing No.1 Middle School is equipped with a water dispenser, and the working principle circuit diagram of its heating part is shown in the figure, where S is a temperature control switch and R1 is electricity. (1) heat absorbed Q=cm△t=4.2×13J/(kg? ℃）×1kg×5℃=2.1×15J；

a: the absorbed heat is 2.1× 15 j;

(2) when heating, the resistance R1=U2P heating = (22v) 24w = 121Ω;

p = i2r1 = (ur1+R2) 2r1 during heat preservation;

So 64W=(22V121Ω+R2)2×121Ω

After finishing, R2 = 181.5Ω.

Answer: The resistance values of R1 and R2 are 121Ω and 181.5Ω respectively.