Heat of combustion of gasoline is 50 MJ/kg. What mass of the gasoline is needed to release 10 MJ of heat? /Give the answer in [g] /

How much energy is required to completely melt 5.00 kg of gold which is initially at room temperature (20° C)? [Gold is often stored in 5.00 kg bars.Some physical properties of gold:specific heat capacity of solid gold -- 129 J/kg°Cfreezing/melting point -- 1063° Clatent heat of melting -- 6.44 x 104 J/kg]

What is the magnitude of energy (in MJ) that must be removed to freeze 466 L of water with a density of  999.8 Kg/m3 that is already at 0˚C [round your final answer to one decimal place]? {latent heats of water: Lf = 33.5 × 104 J/kg, and Lv = 22.6 × 105 J/kg}

A 4.09 kg silver ingot is taken from a furnace, where its temperature is 747 ∘C, and placed on a very large block of ice at 0.00 ∘C. Part A) Assuming that all the heat given up by the silver is used to melt the ice and that not all the ice melts, how much ice is melted? m= --------kg

Hello, Can you please answer this question?   The heat of combustion of gasoline is approximately 47 kJ /g . If a gasoline engine operated between 1500 K and 750 K, what is the maximum height that 5.0g of gasoline can lift an aircraft that weighs 400 kg?

A2] The figure shows a copper disk of radius r and thickness r, with a hole through its centre of radius a: Find an expression for the volume of the copper. b) Find an expression for the increase in temperature of the copper AT if it is supplied with an amount of heat Q at constant pressure. The density and specific heat (heat capacity per unit mass) of copper at constant pressure are PCu and ccu respectively. (You should treat these quantities as constants even though thermal expansion will slightly reduce the density, for example). c) of the disk AA/A when its temperature increases by AT, if the coefficient of linear expansion of copper is aCu- (change in dimension)", such as (Ar). Find an expression for the fractional increase in area of the top surface You should ignore terms of the order

How much heat is required to convert 5 kg of ice at -20C to steam at +100C? (relevant constants given below for convenience) Cice= 2.108x103 J/kg°C Cwater= 4.186x10³ J/kg°C L= 3.335x105 J/kg Ly= 2.260x106 J/kg O 2.303 × 106 J O 1.360 × 107 J O 1.485 × 107 J O 1.527 × 107 J O 1.570 × 107 J

How much heat (in joules) is required to raise the temperature of 24.4 kg of water from 19 ∘C to 88 ∘C? Express your answer using two significant figures.

Air at 21°C  is blown over a hot pipe with a surface area of 3.61 m2 to dissipate 922 W of heat energy.  What is the minimum convection heat transfer coefficient that will ensure that the temperature of the pipe surface is less than 45°C [round your final answer to two decimal places]?

The temperature of an aluminum disk is increased by 250 ∘C. By what percentage does its volume increase?