Approximately how many joules of heat are needed to raise the temperature of a 4.0-gram sample of water to 8.0C?
Its 134 joules you imbeciles
134 joules
To find the amount of heat needed to raise the temperature of a substance, you can use the formula:
Q = m * c * ΔT
Where:
Q: Amount of heat (in joules)
m: Mass of the substance (in grams)
c: Specific heat capacity of the substance (in joules/gram°C)
ΔT: Change in temperature (in °C)
For water, the specific heat capacity is approximately 4.18 joules/gram°C.
Using the given values:
m = 4.0 grams
ΔT = 8.0°C
c = 4.18 joules/gram°C
Substituting these values into the formula, we get:
Q = 4.0 grams * 4.18 joules/gram°C * 8.0°C
Calculating this expression, we get:
Q ≈ 133.76 joules
Therefore, approximately 133.76 joules of heat are needed to raise the temperature of a 4.0-gram sample of water to 8.0°C.