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 J
B. 21 J
C. 8.4 J
D. 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.
Similar Questions
How much energy is required to change 150.0 g of water from 10.0°C to 45.0°C? (Cwater = 4.18 J/g • °C)A 125.4 JB 627.0 JC 21900 JD 28200 J
he specific heat capacity of water is 4.2 kJ/kg°C.Calculate the energy required to increase the temperature of 0.60 kg of water from 31°C to 56°C.
Specific heat capacity of water is 4200 J/kg⁰C. How much energy is needed to raise thetemperature of 3kg of water by 4⁰C?
How many joules of heat are required to raise the temperature of 20.0 grams of water from 30.0°C to 40.0°C?A 42 JB 84 JC 420 JD 840 J
The specific heat capacity of water is 4.184 J g -1 K -1 . Calculate the amount of heatrequired to raise the temperature of 1.00 g of water by 1.00 K
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.