Final answer:
To calculate the specific heat capacity of water with the given details, we would need the formula Q = mcΔT and the time the heater was on. As the time is not provided, it is not possible to determine the specific heat capacity in this case.
Step-by-step explanation:
To find the specific heat capacity of water given the content loaded, the mass of the water was 450g, the power of the heater was 300W, and the change in temperature was 70°C, we can use the formula Q = mcΔT, where Q is the heat energy transferred, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature. Since power (P) is the rate of energy transfer per unit time, and assuming the heating process took place for a time t, we can express Q as P × t. We can then use the formula to solve for the specific heat capacity (c) as follows: c = Q / (mΔT) = (P × t) / (mΔT) However, to calculate c, we also need to know the time t during which the heater was on. Without the time, we cannot determine the specific heat capacity of the water. If we had the time, we could simply plug the values into the formula and solve for c.