Appendix A. Item 1 of Test 2
A. Suppose that 500 g of hot water at 60
C is mixed with
500 g of cold water at 40
C.
1. The temperature of the hot water increases,
decreases, or remains the same? Explain your
reasoning.
2. The temperature of the cold water increases,
decreases, or remains the same? Explain your
reasoning.
3. The temperature of the mixture will be higher than
50
C, lower than 50
C, or exactly at 50
C? Explain
your reasoning.
B. Suppose that 250 g of hot water at 60
C is mixed with
500 g of cold water at 40
C.
1. The temperature of the hot water increases,
decreases, or remains the same? Explain your
reasoning.
2. The temperature of the cold water increases,
decreases, or remains the same? Explain your
reasoning.
3. The temperature of the mixture will be higher than
50
C, lower than 50
C, or exactly at 50
C? Explain
your reasoning.