how much energy is needed to warm a 45g iron sample from 20 degrees celsius to 37.5 degrees celsius?
calculate the energy change when 60g 0f water boils at 100 degrees celsius (Hvap= 40.66 kj/mol)
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To calculate the energy needed to warm a sample, you can use the formula:
Q = m * c * ΔT
Where:
Q - Energy required (in Joules)
m - Mass of the sample (in grams)
c - Specific heat capacity of the substance (in J/g°C)
ΔT - Change in temperature (in °C)
In this case, we need to warm a 45g iron sample from 20°C to 37.5°C. To calculate the energy, we first need to find the specific heat capacity of iron.
The specific heat capacity of iron is approximately 0.45 J/g°C.
Now we can use the formula to calculate the energy required:
Q = 45g * 0.45 J/g°C * (37.5°C - 20°C)
Step 1: Calculate the change in temperature
ΔT = 37.5°C - 20°C = 17.5°C
Step 2: Calculate the energy required
Q = 45g * 0.45 J/g°C * 17.5°C
Multiplying these values together will give us the energy required in Joules.