Initially, at a temperature of 293 K, a rectangular steel plate measures 60.00 c
ID: 2034567 • Letter: I
Question
Initially, at a temperature of 293 K, a rectangular steel plate measures 60.00 cm by 20.00 cm 6. (4] (a) At 593 K: (1) the ratio AL/L, for the 60-cm side will be greater than AL/L, for the 20-cm side. (2) the ratio AL/L, for the 60-cm side will be equal to AL/L, for the 20-cm side. (3) the ratio AL/L, for the 60-cm side will be less than AL/L, for the 20-cm side. (b) Compute the area of the steel plate at 593 K. 7. [4] 3.00 m of air, initially at 10°'C and (absolute) pressure 1.00 atm is compressed to 1.00 m bringing its temperature up to 30°C. What is the new pressure? 8. 13] How much heat energy is needed to change the temperature of Lake Erie by 1.00°c? Use mass water in Lake Erie of 4.80x1014 kg. 3/19/2018 THQ 1.docx 2/2Explanation / Answer
7) P1V1 / T1 = P2V2 / T2
1*3 / (273+10) = P2*1 / (273+30)
P2 = 3.21 atm
8) Heat energy reqruired = mcdT
= 4.8*10^14*4186*1
= 2*10^18 J
so the heat energy required is 2*10^18 J