加拿大十年级的物理题1.How much water could be evaporate by 17.6kJ of e
加拿大十年级的物理题
1.How much water could be evaporate by 17.6kJ of energy?Assume that all the energy is used to evaporate the water.Quote your answer to 2 decimal places and in grams - but don't include the actual units in your submitted answer!
2.An athlete pours 264.9g of water onto the rocks in a sauna.The water at a temperature of 20oC.The air in the sauna is 160oC.How much energy is absorbed by the water?Quote your answer to 2 decimal places and in Joules - but don't include the actual units in your submitted answer!
3.Marks:--/1 How much energy is released when 78.30g of gaseous water condenses?Quote your answer to 2 decimal places and in Joules - but don't include the actual units in your submitted answer
4.What mass of ethanol can be converted from liquid to solid if 18977.87 J of heat energy are removed from it?Quote your answer to 2 decimal places and in grams - but don't include the actual units in your submitted answer!
5.How much energy is required to melt 47.2kg of ice?Quote your answer to 2 decimal places and in Joules - but don't include the actual units in your submitted answer!
1.How much water could be evaporate by 17.6kJ of energy?Assume that all the energy is used to evaporate the water.Quote your answer to 2 decimal places and in grams - but don't include the actual units in your submitted answer!
2.An athlete pours 264.9g of water onto the rocks in a sauna.The water at a temperature of 20oC.The air in the sauna is 160oC.How much energy is absorbed by the water?Quote your answer to 2 decimal places and in Joules - but don't include the actual units in your submitted answer!
3.Marks:--/1 How much energy is released when 78.30g of gaseous water condenses?Quote your answer to 2 decimal places and in Joules - but don't include the actual units in your submitted answer
4.What mass of ethanol can be converted from liquid to solid if 18977.87 J of heat energy are removed from it?Quote your answer to 2 decimal places and in grams - but don't include the actual units in your submitted answer!
5.How much energy is required to melt 47.2kg of ice?Quote your answer to 2 decimal places and in Joules - but don't include the actual units in your submitted answer!
赞 冰蓝天下 幼苗
共回答了16个问题采纳率：100% 举报
1 一个大气压下 1000g水转化需要多少KJ 去查一下 假设它是2256KJ 那么就是X/17.6=1000/2256
X=7.80g 保留小数点后两位
2
Q=cm△t
水的比热容 4.2×1000J/（KG℃）
Q = 4.2*1000 *0.2649*(160-20)
= 155761.20J
3
Q=cm△t
=4.2*1000 *0.0783*（0-100）
=-32886.00
回答的不一定正确啊.大概是这个概念 我翻译一下 4题 5 题 请牛人作答
4.What mass of ethanol can be converted from liquid to solid if 18977.87 J of heat energy are removed from it?Quote your answer to 2 decimal places and in grams - but don't include the actual units in your submitted answer!
如果用18977.87焦耳的能量把乙醇从液体变成固体.那么乙醇的质量是多少?单位用克 保留小数点后2位有效数字 但是回答总体问题的时候不需要单位.
5.How much energy is required to melt 47.2kg of ice?Quote your answer to 2 decimal places and in Joules - but don't include the actual units in your submitted answer!
把47.2千克的冰融化需要多少能量?单位用克 保留小数点后2位有效数字 但是回答总体问题的时候不需要单位.
X=7.80g 保留小数点后两位
2
Q=cm△t
水的比热容 4.2×1000J/（KG℃）
Q = 4.2*1000 *0.2649*(160-20)
= 155761.20J
3
Q=cm△t
=4.2*1000 *0.0783*（0-100）
=-32886.00
回答的不一定正确啊.大概是这个概念 我翻译一下 4题 5 题 请牛人作答
4.What mass of ethanol can be converted from liquid to solid if 18977.87 J of heat energy are removed from it?Quote your answer to 2 decimal places and in grams - but don't include the actual units in your submitted answer!
如果用18977.87焦耳的能量把乙醇从液体变成固体.那么乙醇的质量是多少?单位用克 保留小数点后2位有效数字 但是回答总体问题的时候不需要单位.
5.How much energy is required to melt 47.2kg of ice?Quote your answer to 2 decimal places and in Joules - but don't include the actual units in your submitted answer!
把47.2千克的冰融化需要多少能量?单位用克 保留小数点后2位有效数字 但是回答总体问题的时候不需要单位.
1年前
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