how many joules of heat are used in raising temp of 25 g of water from 20 to 35 degrees celcius
q = mass water x specific heat water x delta T.
formula: heat=mass of water*shc of water*change in temp.
h=25*4.2*15
h=1575joules
To calculate the amount of heat required to raise the temperature of a substance, you can use the formula:
Q = mcΔT
Where:
Q is the heat energy in joules
m is the mass of the substance in grams
c is the specific heat capacity of the substance in J/g·°C
ΔT is the change in temperature in degrees Celsius
In this case, we need to find the amount of heat energy (Q) required to raise the temperature of 25 g of water from 20 to 35 degrees Celsius.
The specific heat capacity of water is approximately 4.18 J/g·°C.
Using the formula, we can substitute the given values:
Q = (25 g) * (4.18 J/g·°C) * (35°C - 20°C)
Q = 25 * 4.18 * 15
Q ≈ 1567.5 J
Therefore, approximately 1567.5 joules of heat are used to raise the temperature of 25 g of water from 20 to 35 degrees Celsius.