Physics

Problem

Using table 1, state which of the following statements is correct.

Substance	Specific heat capacity / $\text{kJ kg}^{-1} \text{K}^{-1}$
water	4.18
ethanol	2.44
copper	0.385

a. More heat is needed to increase the temperature of 50 g of water by

50^\circ\text{C}

than 50 g of ethanol by

50^\circ\text{C}

. b. If the same heat is supplied to equal masses of ethanol and water, the temperature of the water will increase more. c. If equal masses of water at

20^\circ\text{C}

and ethanol at

50^\circ\text{C}

are mixed together, the final temperature will be

35^\circ\text{C}

. d. If equal masses of water and ethanol at

50^\circ\text{C}

cool down to room temperature, ethanol gives out more heat.

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