25 Jun How many kilojoules of heat energy are required to raise the temperature
Question
How many kilojoules of heat energy are required to raise the temperature of 400.0g of water from 18.0ºC to 25.0 ºC?
12 kJ
42 kJ
12000 kJ
30. KJ
Flag this Question Question 25 pts What is the specific heat of a solid that requires 124 J of heat to raise the temperature of 95.5 g of the substance from 20.0 ºC to 25.0 ºC?
2.6 J/gºC
0.26 J/gºC
5.9 × 104 J/gºC
1.4 J/gºC
Flag this Question Question 35 pts A 400.0 g metal bar requires 6.446 kJ of energy to change its temperature from 18.0 ºC to 95.0 ºC. What is the specific heat of the metal?
0.895 J/gºC
2.09 × 10-4 J/gºC
0.209 J/gºC
161 J/gºC
Flag this Question Question 45 pts A 25.0 g sample of magnesium at 22.0 ºC absorbs 356.3 J of heat. The temperature of the magnesium rises to 36.5 ºC. What is the specific heat of the magnesium?
0.983 J/gºC
0.444 J/gºC
0.648 J/gºC
0.390 J/gºC
Flag this Question Question 55 pts The specific heat of aluminum is 0.900 J/g ºC. How much energy is required to heat 45.0 g of aluminum from 20.0 ºC to 50.0 ºC?
2030 J
1220 J
810. J
2840 J
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