Note: The question is incomplete. The complete question is given below : Suppose a substance has a heat of fusion equal to 45 cal/g and a specific heat of 0.75 cal/g°C in the liquid state. If 5.0 kcal of heat are applied to a 50 g sample of the substance at a temperature of 24°C, what will its new temperate be? What state will the sample be in? (melting point of the substance = 27°C; specific heat of the solid =0.48 cal/g°C; boiling point of the substance = 700°C) Explanation: 1.a) Heat energy required to raise the temperature of the substance to its melting point, H = mcΔT Mass of solid sample = 50 g; specific heat of solid = 0.75 cal/g; ΔT = 27 - 24 = 3 °C H = 50 × 0.75 × 3 = 112.5 calories b) Heat energy required to convert the solid to liquid at its melting point at 27°C, H = m×l, where l = 45 cal/g H = 50 × 45 = 2250 cal c) Total energy used so far = 112.5 cal + 2250 cal = 2362.5 calories. Amount of energy left = 5000 - 2362.5 = 2637.5 cal The remaining energy is used to heat the liquid H = mcΔT Where specific heat of the liquid, c = 0.75 cal/g/°C, H = 2637.5 cal, ΔT = temperature change 2637.5 = 50 × 0.75 x ΔT ΔT = 2637.5 / ( 50*0.75) ΔT = 70.3 °C Final temperature of sample = (70.3 + 27) °C = 97.3 °C The substance will be in liquid state at a temperature of 97.3 °C
A chemical formula can tell one the consisting atoms, the types of atoms and which they belong.Also through mole ratios, the number of atoms contained in a compound can also be identified through the chemical formula. In this problem, the answer is a. True.
There are two sets of groups in the periodic table. The first set are Group A elements and are also known as representative elements. The second set are Group B elements and are also known as transition metals. Representative elements are the most abundant elements on earth.
- A 100 mL graduated cylinder since it has marks showing the volume of the substance measured.
Explanation;
-A graduated cylinder or a measuring cylinder is a common piece of laboratory equipment used to measure precise volumes of a liquid.
-Graduated cylinders are specifically designed to measure out liquid volumes. Their tall narrow design makes for a more precise reading of the liquid level as compared to other pieces used to measure volume.
