How much energy is needed to raise the temperature of 2.0 g of water 5.0°C? (Refer to table of constants for water.)A.1.7 JB.21 JC.8.4 JD.42 J
Question
How much energy is needed to raise the temperature of 2.0 g of water 5.0°C? (Refer to table of constants for water.)A.1.7 JB.21 JC.8.4 JD.42 J
Solution
To solve this problem, we need to use the formula for calculating heat energy:
Q = mcΔT
where:
- Q is the heat energy
- m is the mass of the substance (in this case, water)
- c is the specific heat capacity of the substance (for water, it's typically 4.18 J/g°C)
- ΔT is the change in temperature
Given in the problem, we have:
- m = 2.0 g
- ΔT = 5.0°C
Plugging these values into the formula, we get:
Q = (2.0 g) * (4.18 J/g°C) * (5.0°C) = 41.8 J
So, none of the options A, B, C, or D are correct. The energy needed to raise the temperature of 2.0 g of water by 5.0°C is 41.8 J.
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